chore(deps): update dependency mocha to ^5.0.0 (#28)

Author: renovate[bot]

package.json

@@ -31,7 +31,7 @@
   ],
   "devDependencies": {
     "markdown-toc": "^1.0.2",
-    "mocha": "^4.0.1"
+    "mocha": "^5.0.0"
   },
   "dependencies": {
     "textlint-rule-ja-no-abusage": "^1.1.1",

yarn.lock

@@ -475,9 +475,9 @@ mkdirp@0.5.1:
   dependencies:
     minimist "0.0.8"
 
-mocha@^4.0.1:
-  version "4.0.1"
-  resolved "https://registry.yarnpkg.com/mocha/-/mocha-4.0.1.tgz#0aee5a95cf69a4618820f5e51fa31717117daf1b"
+mocha@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/mocha/-/mocha-5.0.0.tgz#cccac988b0bc5477119cba0e43de7af6d6ad8f4e"
   dependencies:
     browser-stdout "1.3.0"
     commander "2.11.0"