[update] eslint rules

.eslintrc

@@ -1,19 +1,20 @@
 {
-  "extends": "eslint-config-airbnb/base", // https://github.com/airbnb/javascript/blob/master/packages/eslint-config-airbnb/.eslintrc
+  "extends": "eslint-config-airbnb-base",
 
   // Allow the following global variables
   "env": {
-    "browser": true, // browser global variables
-    "node": true, // Node.js global variables and Node.js scoping.
-    "mocha": true // adds all of the Mocha testing global variables.
+    "node": true // Node.js global variables and Node.js scoping.
   },
 
-  "ecmaFeatures": {
-    "restParams": true,
-    "experimentalObjectRestSpread": true
+  "parserOptions": {
+    "ecmaFeatures": {
+      experimentalObjectRestSpread: true
+    }
   },
 
   "rules": {
+    "strict": [2, "safe"],
+
     /**
      * ES6
      */
@@ -52,6 +53,7 @@
       "builtinGlobals": true
     }],
     "wrap-iife": [2, "inside"],
+    "max-len": [2, 130, 2, {"ignoreUrls": true}],
 
     /**
      * Style
@@ -61,13 +63,16 @@
         "var": 2,
         "let": 2,
         "const": 3
-      }
+      },
+      "SwitchCase": 1
     }],
     "func-names": 0,
     "no-multiple-empty-lines": [2, {
       "max": 1
     }],
     "no-extra-parens": [2, "functions"],
-    "one-var": 0
+    "one-var": 0,
+    "space-before-function-paren": [2, "never"],
+    "no-underscore-dangle": 0
   }
 }

test/.eslintrc

@@ -0,0 +1,5 @@
+{
+  "env": {
+    "mocha": true // adds all of the Mocha testing global variables.
+  }
+}