Add flowjs support

Author: DaneEveritt

.babelrc

@@ -3,6 +3,9 @@
         "@babel/preset-env"
     ],
     "plugins": [
-        ["@babel/plugin-proposal-object-rest-spread", { "useBuiltIns": true }]
+        ["@babel/plugin-proposal-object-rest-spread", { "useBuiltIns": true }],
+        "babel-plugin-transform-class-properties",
+        "babel-plugin-syntax-flow",
+        "babel-plugin-transform-flow-strip-types"
     ]
 }

.eslintrc

@@ -0,0 +1,11 @@
+{
+  "parser": "babel-eslint",
+  "plugins": ["html", "flowtype-errors"],
+  "extends": ["vue"],
+  "rules": {
+    "flowtype-errors/show-errors": 2,
+    "semi": "off",
+    "indent": ["error", 4],
+    "comma-dangle": ["error", "always-multiline"]
+  }
+}

.flowconfig

@@ -0,0 +1,14 @@
+[ignore]
+<PROJECT_ROOT>/vendor/.*
+<PROJECT_ROOT>/tests/.*
+<PROJECT_ROOT>/storage/.*
+<PROJECT_ROOT>/app/.*
+
+[options]
+module.name_mapper='^/\(.*\)$' -> '<PROJECT_ROOT>/\1'
+module.file_ext=.js
+module.file_ext=.vue
+module.file_ext=.json
+
+[version]
+0.81.0

package.json

@@ -23,15 +23,25 @@
         "axios": "^0.18.0",
         "babel-cli": "6.18.0",
         "babel-core": "^6.26.3",
+        "babel-eslint": "^9.0.0",
         "babel-loader": "^8.0.0-beta.3",
+        "babel-plugin-syntax-flow": "^6.18.0",
+        "babel-plugin-transform-class-properties": "^6.24.1",
+        "babel-plugin-transform-flow-strip-types": "^6.22.0",
         "babel-plugin-transform-object-assign": "^6.22.0",
         "babel-plugin-transform-runtime": "^6.23.0",
         "babel-plugin-transform-strict-mode": "^6.18.0",
         "babel-register": "^6.26.0",
         "camelcase": "^5.0.0",
         "clean-webpack-plugin": "^0.1.19",
         "css-loader": "^0.28.11",
+        "eslint": "^5.6.0",
+        "eslint-config-vue": "^2.0.2",
+        "eslint-plugin-flowtype-errors": "^3.6.0",
+        "eslint-plugin-html": "^4.0.6",
+        "eslint-plugin-vue": "^4.7.1",
         "extract-text-webpack-plugin": "^4.0.0-beta.0",
+        "flow-bin": "^0.81.0",
         "glob-all": "^3.1.0",
         "html-webpack-plugin": "^3.2.0",
         "jquery": "^3.3.1",