add eslint-config-airbnb and stylelint (#216)

.eslintrc

@@ -1,14 +1,54 @@
 {
   "rules": {
+    "jsx-a11y/anchor-has-content": "off",
+    "jsx-a11y/anchor-is-valid": "off",
+    "jsx-a11y/label-has-for": "off",
+    "jsx-a11y/click-events-have-key-events": "off",
+    "jsx-a11y/no-static-element-interactions": "off",
+    "jsx-a11y/no-noninteractive-element-interactions": "off",
+    "import/no-extraneous-dependencies": [
+      "error",
+      {
+        "devDependencies": true
+      }
+    ],
+    "import/no-named-default": "off",
+    "import/prefer-default-export": "off",
+    "no-alert": "off",
+    "no-param-reassign": "off",
+    "no-plusplus": "off",
+    "no-prototype-builtins": "off",
+    "no-restricted-syntax": "off",
+    "no-underscore-dangle": "off",
+    "no-unused-expressions": [
+      "error",
+      { "allowShortCircuit": true, "allowTernary": true }
+    ],
+    "no-unused-vars": [
+      "error",
+      {
+        "vars": "all",
+        "args": "none",
+        "ignoreRestSiblings": true
+      }
+    ],
+    "no-use-before-define": "off",
     "prettier/prettier": [
       "error",
       { "singleQuote": true, "trailingComma": "none" }
-    ]
+    ],
+    "react/no-array-index-key": "off",
+    "react/forbid-prop-types": "off",
+    "react/jsx-filename-extension": "off",
+    "react/jsx-uses-vars": "error",
+    "react/no-danger": "off"
   },
   "extends": [
     "standard",
     "standard-react",
     "standard-jsx",
+    "airbnb",
+    "plugin:jest/recommended",
     "prettier",
     "prettier/react"
   ],
@@ -18,6 +58,6 @@
     "node": true,
     "jest": true
   },
-  "plugins": ["prettier", "react"],
+  "plugins": ["prettier", "jest", "react"],
   "parser": "babel-eslint"
 }

.stylelintrc

@@ -0,0 +1,4 @@
+{
+  "defaultSeverity": "warning",
+  "extends": ["stylelint-config-standard"]
+}