diff --git a/Gemfile.lock b/Gemfile.lock
index 3c1b1f9..8da90ef 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -13,9 +13,9 @@ GEM
       execjs
     coffee-script-source (1.11.1)
     colorator (1.1.0)
-    commonmarker (0.17.9)
+    commonmarker (0.17.13)
       ruby-enum (~> 0.5)
-    concurrent-ruby (1.0.5)
+    concurrent-ruby (1.1.4)
     dnsruby (1.61.2)
       addressable (~> 2.5)
     em-websocket (0.5.1)
@@ -25,23 +25,23 @@ GEM
       ffi (>= 1.3.0)
     eventmachine (1.2.7)
     execjs (2.7.0)
-    faraday (0.15.2)
+    faraday (0.15.4)
       multipart-post (>= 1.2, < 3)
     ffi (1.9.25)
     forwardable-extended (2.6.0)
     gemoji (3.0.0)
-    github-pages (188)
+    github-pages (193)
       activesupport (= 4.2.10)
       github-pages-health-check (= 1.8.1)
-      jekyll (= 3.7.3)
+      jekyll (= 3.7.4)
       jekyll-avatar (= 0.6.0)
       jekyll-coffeescript (= 1.1.1)
       jekyll-commonmark-ghpages (= 0.1.5)
       jekyll-default-layout (= 0.1.4)
-      jekyll-feed (= 0.10.0)
+      jekyll-feed (= 0.11.0)
       jekyll-gist (= 1.5.0)
       jekyll-github-metadata (= 2.9.4)
-      jekyll-mentions (= 1.4.0)
+      jekyll-mentions (= 1.4.1)
       jekyll-optional-front-matter (= 0.3.0)
       jekyll-paginate (= 1.1.0)
       jekyll-readme-index (= 0.2.0)
@@ -66,8 +66,8 @@ GEM
       jekyll-theme-tactile (= 0.1.1)
       jekyll-theme-time-machine (= 0.1.1)
       jekyll-titles-from-headings (= 0.5.1)
-      jemoji (= 0.10.0)
-      kramdown (= 1.16.2)
+      jemoji (= 0.10.1)
+      kramdown (= 1.17.0)
       liquid (= 4.0.0)
       listen (= 3.1.5)
       mercenary (~> 0.3)
@@ -81,13 +81,13 @@ GEM
       octokit (~> 4.0)
       public_suffix (~> 2.0)
       typhoeus (~> 1.3)
-    html-pipeline (2.8.4)
+    html-pipeline (2.9.1)
       activesupport (>= 2)
       nokogiri (>= 1.4)
     http_parser.rb (0.6.0)
     i18n (0.9.5)
       concurrent-ruby (~> 1.0)
-    jekyll (3.7.3)
+    jekyll (3.7.4)
       addressable (~> 2.4)
       colorator (~> 1.0)
       em-websocket (~> 0.5)
@@ -114,14 +114,14 @@ GEM
       rouge (~> 2)
     jekyll-default-layout (0.1.4)
       jekyll (~> 3.0)
-    jekyll-feed (0.10.0)
+    jekyll-feed (0.11.0)
       jekyll (~> 3.3)
     jekyll-gist (1.5.0)
       octokit (~> 4.2)
     jekyll-github-metadata (2.9.4)
       jekyll (~> 3.1)
       octokit (~> 4.0, != 4.4.0)
-    jekyll-mentions (1.4.0)
+    jekyll-mentions (1.4.1)
       html-pipeline (~> 2.3)
       jekyll (~> 3.0)
     jekyll-optional-front-matter (0.3.0)
@@ -185,43 +185,43 @@ GEM
       jekyll-seo-tag (~> 2.0)
     jekyll-titles-from-headings (0.5.1)
       jekyll (~> 3.3)
-    jekyll-watch (2.0.0)
+    jekyll-watch (2.1.2)
       listen (~> 3.0)
-    jemoji (0.10.0)
+    jemoji (0.10.1)
       gemoji (~> 3.0)
       html-pipeline (~> 2.2)
       jekyll (~> 3.0)
-    kramdown (1.16.2)
+    kramdown (1.17.0)
     liquid (4.0.0)
     listen (3.1.5)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
       ruby_dep (~> 1.2)
     mercenary (0.3.6)
-    mini_portile2 (2.3.0)
+    mini_portile2 (2.4.0)
     minima (2.5.0)
       jekyll (~> 3.5)
       jekyll-feed (~> 0.9)
       jekyll-seo-tag (~> 2.1)
     minitest (5.11.3)
     multipart-post (2.0.0)
-    nokogiri (1.8.4)
-      mini_portile2 (~> 2.3.0)
-    octokit (4.9.0)
+    nokogiri (1.9.1)
+      mini_portile2 (~> 2.4.0)
+    octokit (4.13.0)
       sawyer (~> 0.8.0, >= 0.5.3)
-    pathutil (0.16.1)
+    pathutil (0.16.2)
       forwardable-extended (~> 2.6)
     public_suffix (2.0.5)
     rb-fsevent (0.10.3)
-    rb-inotify (0.9.10)
-      ffi (>= 0.5.0, < 2)
+    rb-inotify (0.10.0)
+      ffi (~> 1.0)
     rouge (2.2.1)
     ruby-enum (0.7.2)
       i18n
     ruby_dep (1.5.0)
-    rubyzip (1.2.1)
+    rubyzip (1.2.2)
     safe_yaml (1.0.4)
-    sass (3.5.7)
+    sass (3.7.2)
       sass-listen (~> 4.0.0)
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
@@ -232,11 +232,11 @@ GEM
     terminal-table (1.8.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
     thread_safe (0.3.6)
-    typhoeus (1.3.0)
+    typhoeus (1.3.1)
       ethon (>= 0.9.0)
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
-    unicode-display_width (1.4.0)
+    unicode-display_width (1.4.1)
 
 PLATFORMS
   ruby
@@ -245,4 +245,4 @@ DEPENDENCIES
   github-pages
 
 BUNDLED WITH
-   1.16.1
+   1.17.3
diff --git a/package-lock.json b/package-lock.json
index 67b5def..e8cf979 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -33,30 +33,38 @@
       "dev": true
     },
     "@textlint/ast-traverse": {
-      "version": "2.0.8",
-      "resolved": "https://registry.npmjs.org/@textlint/ast-traverse/-/ast-traverse-2.0.8.tgz",
-      "integrity": "sha512-QwPV3J0mikGoEnUJk5VeOuTnSUUK1y7BVPcl7F9f9Mrj22SPRmlkGiY3WtuDxe7Lka8yJ5hBVIZpXevyQ98YCg==",
+      "version": "2.0.9",
+      "resolved": "https://registry.npmjs.org/@textlint/ast-traverse/-/ast-traverse-2.0.9.tgz",
+      "integrity": "sha512-E2neVj65wyadt3hr9R+DHW01dG4dNOMmFRab7Bph/rkDDeK85w/6RNJgIt9vBCPtt7a4bndTj1oZrK6wDZAEtQ==",
       "dev": true,
       "requires": {
-        "@textlint/ast-node-types": "^4.0.2"
+        "@textlint/ast-node-types": "^4.0.3"
+      },
+      "dependencies": {
+        "@textlint/ast-node-types": {
+          "version": "4.0.3",
+          "resolved": "https://registry.npmjs.org/@textlint/ast-node-types/-/ast-node-types-4.0.3.tgz",
+          "integrity": "sha512-mkkqbuxZkCESmMCrVN5QEgmFqBJAcoAGIaZaQfziqKAyCQBLLgKVJzeFuup9mDm9mvCTKekhLk9yIaEFc8EFxA==",
+          "dev": true
+        }
       }
     },
     "@textlint/feature-flag": {
-      "version": "3.0.4",
-      "resolved": "https://registry.npmjs.org/@textlint/feature-flag/-/feature-flag-3.0.4.tgz",
-      "integrity": "sha512-1Pd6Ebgl42Vv9GpzdC+Mdf1FmCYHm7xTKiQkm+K5jFBkTrFde7YnPYhc3Dj2PHO3G9DVVyne1vV8lOIMRZ+3DA==",
+      "version": "3.0.5",
+      "resolved": "https://registry.npmjs.org/@textlint/feature-flag/-/feature-flag-3.0.5.tgz",
+      "integrity": "sha512-hXTDGvltgiUtJs7QhALSILNE+g0cdY4CyqHR2r5+EmiYbS3NuqWVLn3GZYUPWXl9rVDky/IpR+6DF0uLJF8m8Q==",
       "dev": true,
       "requires": {
         "map-like": "^2.0.0"
       }
     },
     "@textlint/fixer-formatter": {
-      "version": "3.0.7",
-      "resolved": "https://registry.npmjs.org/@textlint/fixer-formatter/-/fixer-formatter-3.0.7.tgz",
-      "integrity": "sha512-JMVr4jkKbhn8RdwflfLxEvK+lQw//ZVkX8mPBPMplJBRzubn+23WNml+VLRQMMLrMO7p8yLFtQ9yudzQimRUUw==",
+      "version": "3.0.9",
+      "resolved": "https://registry.npmjs.org/@textlint/fixer-formatter/-/fixer-formatter-3.0.9.tgz",
+      "integrity": "sha512-ypuYZ+A20OGKr4FlECLJF6WXj7bxUKrCH2tY89I/ITwlO2jAD8l8eFj3ECSb1mvICtktWCPel18dI7GXscesxQ==",
       "dev": true,
       "requires": {
-        "@textlint/kernel": "^2.0.9",
+        "@textlint/kernel": "^3.0.1",
         "chalk": "^1.1.3",
         "debug": "^2.1.0",
         "diff": "^2.2.2",
@@ -74,31 +82,40 @@
       "dev": true
     },
     "@textlint/kernel": {
-      "version": "2.0.9",
-      "resolved": "https://registry.npmjs.org/@textlint/kernel/-/kernel-2.0.9.tgz",
-      "integrity": "sha512-0237/9yDIlSVaH0pcVAxm0rV1xF96UpjXUXoBRdciWnf2+O0tWQEeBC9B2/B2jLw9Ha0zGlK+q+bLREpXB97Cw==",
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/@textlint/kernel/-/kernel-3.0.1.tgz",
+      "integrity": "sha512-K65L9KdzxZoeziMhyA00Crd/UPGT9a5R9hIOzZGz6dCwc1K90Wp6b/EEUUPPAhMrVcJcA6ZOOaikk9fSbznFjA==",
       "dev": true,
       "requires": {
-        "@textlint/ast-node-types": "^4.0.2",
-        "@textlint/ast-traverse": "^2.0.8",
-        "@textlint/feature-flag": "^3.0.4",
+        "@textlint/ast-node-types": "^4.0.3",
+        "@textlint/ast-traverse": "^2.0.9",
+        "@textlint/feature-flag": "^3.0.5",
         "@types/bluebird": "^3.5.18",
         "bluebird": "^3.5.1",
         "debug": "^2.6.6",
         "deep-equal": "^1.0.1",
+        "map-like": "^2.0.0",
         "object-assign": "^4.1.1",
         "structured-source": "^3.0.2"
+      },
+      "dependencies": {
+        "@textlint/ast-node-types": {
+          "version": "4.0.3",
+          "resolved": "https://registry.npmjs.org/@textlint/ast-node-types/-/ast-node-types-4.0.3.tgz",
+          "integrity": "sha512-mkkqbuxZkCESmMCrVN5QEgmFqBJAcoAGIaZaQfziqKAyCQBLLgKVJzeFuup9mDm9mvCTKekhLk9yIaEFc8EFxA==",
+          "dev": true
+        }
       }
     },
     "@textlint/linter-formatter": {
-      "version": "3.0.7",
-      "resolved": "https://registry.npmjs.org/@textlint/linter-formatter/-/linter-formatter-3.0.7.tgz",
-      "integrity": "sha512-qfqQ0nMjMUCjguCUgixKCcPKudzYTVvfAnHxFMfn5UkrjS3PyDP6WCDUxaHYOpVdpSWYohaipKLHoaABlE88XA==",
+      "version": "3.0.9",
+      "resolved": "https://registry.npmjs.org/@textlint/linter-formatter/-/linter-formatter-3.0.9.tgz",
+      "integrity": "sha512-eF4V2Jjn7FYQHkFNud3pABv0O/Ti/ErxjMDclaIg5bUOh+FZUgc54x4dvGJO6F64slgwzlv4TUGryXJsg/M/JQ==",
       "dev": true,
       "requires": {
         "@azu/format-text": "^1.0.1",
         "@azu/style-format": "^1.0.0",
-        "@textlint/kernel": "^2.0.9",
+        "@textlint/kernel": "^3.0.1",
         "chalk": "^1.0.0",
         "concat-stream": "^1.5.1",
         "js-yaml": "^3.2.4",
@@ -114,18 +131,26 @@
       }
     },
     "@textlint/markdown-to-ast": {
-      "version": "6.0.8",
-      "resolved": "https://registry.npmjs.org/@textlint/markdown-to-ast/-/markdown-to-ast-6.0.8.tgz",
-      "integrity": "sha512-4TzdKTxd8Gu+yjre+GcIuliG0K6F73gNEQwj8b70WzpP6yBsEO2mlhz0nX+/d0n+Wzz/0KLry5UXPPe61dGYSQ==",
+      "version": "6.0.9",
+      "resolved": "https://registry.npmjs.org/@textlint/markdown-to-ast/-/markdown-to-ast-6.0.9.tgz",
+      "integrity": "sha512-hfAWBvTeUGh5t5kTn2U3uP3qOSM1BSrxzl1jF3nn0ywfZXpRBZr5yRjXnl4DzIYawCtZOshmRi/tI3/x4TE1jQ==",
       "dev": true,
       "requires": {
-        "@textlint/ast-node-types": "^4.0.2",
+        "@textlint/ast-node-types": "^4.0.3",
         "debug": "^2.1.3",
         "remark-frontmatter": "^1.2.0",
         "remark-parse": "^5.0.0",
         "structured-source": "^3.0.2",
         "traverse": "^0.6.6",
         "unified": "^6.1.6"
+      },
+      "dependencies": {
+        "@textlint/ast-node-types": {
+          "version": "4.0.3",
+          "resolved": "https://registry.npmjs.org/@textlint/ast-node-types/-/ast-node-types-4.0.3.tgz",
+          "integrity": "sha512-mkkqbuxZkCESmMCrVN5QEgmFqBJAcoAGIaZaQfziqKAyCQBLLgKVJzeFuup9mDm9mvCTKekhLk9yIaEFc8EFxA==",
+          "dev": true
+        }
       }
     },
     "@textlint/regexp-string-matcher": {
@@ -143,36 +168,44 @@
       }
     },
     "@textlint/text-to-ast": {
-      "version": "3.0.8",
-      "resolved": "https://registry.npmjs.org/@textlint/text-to-ast/-/text-to-ast-3.0.8.tgz",
-      "integrity": "sha512-3bqBauUf3R3vbCaOhGzOf/GJEJhaAdAez6/Gi6Mt6h9EktoJFGHkXQWqYJeDl6jKABx53oP19q1qDoP6f00YYg==",
+      "version": "3.0.9",
+      "resolved": "https://registry.npmjs.org/@textlint/text-to-ast/-/text-to-ast-3.0.9.tgz",
+      "integrity": "sha512-0Vycl2XtGv3pUtUNkBn9M/e3jBAtmlh7STUa3GuiyATXg49PsqqX7c8NxGPrNqMvDYCJ3ZubBx8GSEyra6ZWFw==",
       "dev": true,
       "requires": {
-        "@textlint/ast-node-types": "^4.0.2"
+        "@textlint/ast-node-types": "^4.0.3"
+      },
+      "dependencies": {
+        "@textlint/ast-node-types": {
+          "version": "4.0.3",
+          "resolved": "https://registry.npmjs.org/@textlint/ast-node-types/-/ast-node-types-4.0.3.tgz",
+          "integrity": "sha512-mkkqbuxZkCESmMCrVN5QEgmFqBJAcoAGIaZaQfziqKAyCQBLLgKVJzeFuup9mDm9mvCTKekhLk9yIaEFc8EFxA==",
+          "dev": true
+        }
       }
     },
     "@textlint/textlint-plugin-markdown": {
-      "version": "4.0.10",
-      "resolved": "https://registry.npmjs.org/@textlint/textlint-plugin-markdown/-/textlint-plugin-markdown-4.0.10.tgz",
-      "integrity": "sha512-HIV2UAhjnt9/tJQbuXkrD3CRiEFRtNpYoQEZCNCwd1nBMWUypAFthL9jT1KJ8tagOF7wEiGMB19QfDxiNQ+6mw==",
+      "version": "5.0.2",
+      "resolved": "https://registry.npmjs.org/@textlint/textlint-plugin-markdown/-/textlint-plugin-markdown-5.0.2.tgz",
+      "integrity": "sha512-vGYcm3opTtvfkT5B3c6IThTOIESRww/0ummHjqKc4jMXrZ4eZKQlyetl4uHR54bqA2MRmR4stEt/mJfSPmqMqw==",
       "dev": true,
       "requires": {
-        "@textlint/markdown-to-ast": "^6.0.8"
+        "@textlint/markdown-to-ast": "^6.0.9"
       }
     },
     "@textlint/textlint-plugin-text": {
-      "version": "3.0.10",
-      "resolved": "https://registry.npmjs.org/@textlint/textlint-plugin-text/-/textlint-plugin-text-3.0.10.tgz",
-      "integrity": "sha512-GSw9vsuKt7E85jDSFEXT0VYZo4C3e8XFFrSWYqXlwPKl/oQ/WHQfMg7GM288uGoEaMzbKEfBtpdwdZqTjGHOQA==",
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/@textlint/textlint-plugin-text/-/textlint-plugin-text-4.0.2.tgz",
+      "integrity": "sha512-ApJrWnfOZmaaP/bS7Ftfascdkr2omnJRgFxpG/73OPY7j3WPhdqw7XCd7CU+OyX//2PyLnxf5hbK6r1K6svi2w==",
       "dev": true,
       "requires": {
-        "@textlint/text-to-ast": "^3.0.8"
+        "@textlint/text-to-ast": "^3.0.9"
       }
     },
     "@types/bluebird": {
-      "version": "3.5.20",
-      "resolved": "https://registry.npmjs.org/@types/bluebird/-/bluebird-3.5.20.tgz",
-      "integrity": "sha512-Wk41MVdF+cHBfVXj/ufUHJeO3BlIQr1McbHZANErMykaCWeDSZbH5erGjNBw2/3UlRdSxZbLfSuQTzFmPOYFsA==",
+      "version": "3.5.25",
+      "resolved": "https://registry.npmjs.org/@types/bluebird/-/bluebird-3.5.25.tgz",
+      "integrity": "sha512-yfhIBix+AIFTmYGtkC0Bi+XGjSkOINykqKvO/Wqdz/DuXlAKK7HmhLAXdPIGsV4xzKcL3ev/zYc4yLNo+OvGaw==",
       "dev": true
     },
     "ajv": {
@@ -217,7 +250,7 @@
     "argparse": {
       "version": "1.0.10",
       "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.10.tgz",
-      "integrity": "sha512-o5Roy6tNG4SL/FOkCAN6RzjiakZS25RLYFrcMttJqbdd8BWrnA+fGz57iN5Pb06pvBGvl5gQ0B48dJlslXvoTg==",
+      "integrity": "sha1-vNZ5HqWuCXJeF+WtmIE0zUCz2RE=",
       "dev": true,
       "requires": {
         "sprintf-js": "~1.0.2"
@@ -229,27 +262,6 @@
       "integrity": "sha1-bI4obRHtdoMn+OYuzuhzU8o+eLg=",
       "dev": true
     },
-    "array-union": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/array-union/-/array-union-1.0.2.tgz",
-      "integrity": "sha1-mjRBDk9OPaI96jdb5b5w8kd47Dk=",
-      "dev": true,
-      "requires": {
-        "array-uniq": "^1.0.1"
-      }
-    },
-    "array-uniq": {
-      "version": "1.0.3",
-      "resolved": "https://registry.npmjs.org/array-uniq/-/array-uniq-1.0.3.tgz",
-      "integrity": "sha1-r2rId6Jcx/dOBYiUdThY39sk/bY=",
-      "dev": true
-    },
-    "arrify": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/arrify/-/arrify-1.0.1.tgz",
-      "integrity": "sha1-iYUI2iIm84DfkEcoRWhJwVAaSw0=",
-      "dev": true
-    },
     "assign-symbols": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/assign-symbols/-/assign-symbols-1.0.0.tgz",
@@ -266,9 +278,9 @@
       }
     },
     "bail": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/bail/-/bail-1.0.2.tgz",
-      "integrity": "sha1-99bBcxYwqfnw1NNe0fli4gdKF2Q=",
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/bail/-/bail-1.0.3.tgz",
+      "integrity": "sha512-1X8CnjFVQ+a+KW36uBNMTU5s8+v5FzeqrP7hTG5aTb4aPreSbZJlhwPon9VKMuEVgV++JM+SQrALY3kr7eswdg==",
       "dev": true
     },
     "balanced-match": {
@@ -278,9 +290,9 @@
       "dev": true
     },
     "bluebird": {
-      "version": "3.5.1",
-      "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.5.1.tgz",
-      "integrity": "sha512-MKiLiV+I1AA596t9w1sQJ8jkiSr5+ZKi0WKrYGUn6d1Fx+Ij4tIj+m2WMQSGczs5jZVxV339chE8iwk6F64wjA==",
+      "version": "3.5.3",
+      "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.5.3.tgz",
+      "integrity": "sha512-/qKPUQlaW1OyR51WeCPBvRnAlnZFUJkCSG5HzGnuIqhgyJtF+T94lFnn33eiazjRm2LAHVy2guNnaq48X9SJuw==",
       "dev": true
     },
     "boundary": {
@@ -313,7 +325,7 @@
     },
     "chalk": {
       "version": "1.1.3",
-      "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
+      "resolved": "http://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
       "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
       "dev": true,
       "requires": {
@@ -325,21 +337,21 @@
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diff --git a/package.json b/package.json
index 823e25f..3190770 100644
--- a/package.json
+++ b/package.json
@@ -6,7 +6,7 @@
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