[eslint config] [base] update eslint

Author: ljharb

packages/eslint-config-airbnb-base/package.json

@@ -44,13 +44,13 @@
   "homepage": "https://github.com/airbnb/javascript",
   "devDependencies": {
     "babel-tape-runner": "^1.3.1",
-    "eslint": "^2.9.0",
+    "eslint": "^2.10.1",
     "eslint-find-rules": "^1.9.2",
     "eslint-plugin-import": "^1.8.0",
     "tape": "^4.5.1"
   },
   "peerDependencies": {
-    "eslint": "^2.9.0",
+    "eslint": "^2.10.1",
     "eslint-plugin-import": "^1.8.0"
   }
 }

packages/eslint-config-airbnb-base/rules/errors.js

@@ -41,6 +41,7 @@ module.exports = {
     'no-extra-parens': [0, 'all', {
       'conditionalAssign': true,
       'nestedBinaryExpressions': false,
+      'returnAssign': false,
     }],
 
     // disallow unnecessary semicolons

packages/eslint-config-airbnb-base/rules/es6.js

@@ -83,7 +83,10 @@ module.exports = {
 
     // require method and property shorthand syntax for object literals
     // http://eslint.org/docs/rules/object-shorthand
-    'object-shorthand': [2, 'always'],
+    'object-shorthand': [2, 'always', {
+      'ignoreConstructors': false,
+      'avoidQuotes': false, // TODO: enable
+    }],
 
     // suggest using arrow functions as callbacks
     'prefer-arrow-callback': [2, {
@@ -92,7 +95,10 @@ module.exports = {
     }],
 
     // suggest using of const declaration for variables that are never modified after declared
-    'prefer-const': 2,
+    'prefer-const': [2, {
+      'destructuring': 'any',
+      'ignoreReadBeforeAssign': false, // TODO: make true
+    }],
 
     // suggest using the spread operator instead of .apply()
     'prefer-spread': 0,

packages/eslint-config-airbnb-base/rules/style.js

@@ -149,6 +149,13 @@ module.exports = {
     // require padding inside curly braces
     'object-curly-spacing': [2, 'always'],
 
+    // enforce "same line" or "multiple line" on object properties.
+    // http://eslint.org/docs/rules/object-property-newline
+    // TODO: enable when https://github.com/eslint/eslint/issues/5667#issuecomment-219334864 is resolved
+    'object-property-newline': [0, {
+      'allowMultiplePropertiesPerLine': true,
+    }],
+
     // allow just one var statement per function
     'one-var': [2, 'never'],