chore(deps): update babel@7

Author: azu

.babelrc

@@ -1,6 +1,6 @@
 {
   "presets": [
-    "es2015"
+    "@babel/preset-env"
   ],
   "env": {
     "development": {
@@ -9,4 +9,4 @@
       ]
     }
   }
-}
+}

package.json

@@ -14,22 +14,23 @@
     "build": "gitbook build",
     "eslint": "eslint --cache 'src/**/*.js'",
     "textlint": "textlint --cache 'ja/**/*.md' -f pretty-error",
-    "test:js": "mocha",
+    "test:js": "mocha test/",
     "test": "npm-run-all --parallel test:js textlint eslint build"
   },
   "keywords": [
     "gitbook",
     "textlint"
   ],
   "devDependencies": {
-    "babel-cli": "^6.7.7",
-    "babel-preset-es2015": "^6.6.0",
-    "babel-preset-power-assert": "^2.0.0",
-    "babel-register": "^6.7.2",
+    "@babel/cli": "^7.0.0",
+    "@babel/core": "^7.0.0",
+    "@babel/preset-env": "^7.0.0",
+    "@babel/register": "^7.0.0",
+    "babel-preset-power-assert": "^3.0.0",
     "eslint": "^5.0.0",
     "gitbook-cli": "^2.3.2",
     "gitbook-plugin-include-codeblock": "^3.0.0",
-    "mocha": "^5.0.0",
+    "mocha": "^6.1.4",
     "npm-run-all": "^4.0.0",
     "power-assert": "^1.3.1",
     "textlint": "^11.0.0",

test/mocha.opts

@@ -1 +1 @@
---compilers js:babel-register
+--require @babel/register