feat: upgrade Prettier (v1.13)

Closes #108

Author: gregberge

package.json

@@ -15,30 +15,30 @@
   ],
   "license": "MIT",
   "devDependencies": {
-    "@babel/cli": "^7.0.0-beta.46",
-    "@babel/plugin-proposal-class-properties": "^7.0.0-beta.46",
+    "@babel/cli": "^7.0.0-beta.49",
+    "@babel/plugin-proposal-class-properties": "^7.0.0-beta.49",
     "babel-core": "^7.0.0-bridge.0",
     "babel-eslint": "^8.2.3",
-    "babel-jest": "^22.4.3",
+    "babel-jest": "^23.0.1",
     "babel-loader": "^7.1.4",
     "codecov": "^3.0.2",
     "conventional-github-releaser": "^2.0.2",
     "eslint": "^4.19.1",
     "eslint-config-airbnb-base": "^12.0.1",
     "eslint-config-prettier": "^2.9.0",
-    "eslint-plugin-import": "^2.11.0",
-    "jest": "^22.4.3",
+    "eslint-plugin-import": "^2.12.0",
+    "jest": "^23.0.1",
     "memory-fs": "^0.4.1",
-    "react": "^16.3.2",
-    "standard-version": "^4.3.0",
-    "webpack": "^4.8.3"
+    "react": "^16.4.0",
+    "standard-version": "^4.4.0",
+    "webpack": "^4.9.1"
   },
   "dependencies": {
-    "@babel/core": "^7.0.0-beta.46",
-    "@babel/plugin-proposal-object-rest-spread": "^7.0.0-beta.46",
-    "@babel/plugin-transform-react-constant-elements": "^7.0.0-beta.46",
-    "@babel/preset-env": "^7.0.0-beta.46",
-    "@babel/preset-react": "^7.0.0-beta.46",
+    "@babel/core": "^7.0.0-beta.49",
+    "@babel/plugin-proposal-object-rest-spread": "^7.0.0-beta.49",
+    "@babel/plugin-transform-react-constant-elements": "^7.0.0-beta.49",
+    "@babel/preset-env": "^7.0.0-beta.49",
+    "@babel/preset-react": "^7.0.0-beta.49",
     "chalk": "^2.4.1",
     "commander": "^2.15.1",
     "glob": "^7.1.2",
@@ -48,7 +48,7 @@
     "lodash": "^4.17.10",
     "mz": "^2.6.0",
     "output-file-sync": "^2.0.1",
-    "prettier": "^1.12.1",
+    "prettier": "^1.13.0",
     "recursive-readdir": "^2.2.2",
     "svgo": "^1.0.5"
   },

src/plugins/prettier.js

@@ -1,3 +1,4 @@
 import prettier from 'prettier'
 
-export default (code, opts) => prettier.format(code, opts)
+export default (code, opts) =>
+  prettier.format(code, { ...opts, parser: 'babylon' })