Breaking: drop support ESLint v1

- Revive support Node 0.10 and 0.12.
- Upgrade dependencies.

.eslintrc

@@ -1,14 +1,5 @@
 {
-    "extends": "mysticatea/nodejs",
-    "plugins": ["node"],
-    "ecmaFeatures": {
-        "modules": false
-    },
+    "extends": ["mysticatea/es5", "mysticatea/node"],
     "rules": {
-        "func-names": 0,
-        "node/no-missing-require": 2,
-        "node/no-unpublished-require": 2,
-        "node/no-unsupported-features": [2, {"version": 4}],
-        "node/shebang": 2
     }
 }

.travis.yml

@@ -1,9 +1,9 @@
 sudo: false
 language: node_js
 node_js:
+  - "0.10"
+  - "0.12"
   - "4"
-  - "5"
-before_install:
-  - npm install -g npm
+  - "6"
 after_success:
   - npm run coveralls

lib/rules/arrow-parens.js

@@ -4,7 +4,7 @@
  * See LICENSE file in root directory for full license.
  */
 
-"use strict";
+"use strict"
 
 //------------------------------------------------------------------------------
 // Helpers
@@ -16,7 +16,7 @@
  * @returns {boolean} `true` when the token is `(`.
  */
 function isOpenParen(token) {
-    return token.type === "Punctuator" && token.value === "(";
+    return token.type === "Punctuator" && token.value === "("
 }
 
 /**
@@ -26,7 +26,7 @@ function isOpenParen(token) {
  * @returns {boolean} `true` when the tokens are at a same line.
  */
 function isSameLine(a, b) {
-    return a.loc.end.line === b.loc.start.line;
+    return a.loc.end.line === b.loc.start.line
 }
 
 //------------------------------------------------------------------------------
@@ -35,9 +35,9 @@ function isSameLine(a, b) {
 
 module.exports = function(context) {
     return {
-        ArrowFunctionExpression(node) {
-            const first = context.getFirstToken(node);
-            const before = context.getTokenBefore(first);
+        ArrowFunctionExpression: function(node) {
+            var first = context.getFirstToken(node)
+            var before = context.getTokenBefore(first)
 
             if (isOpenParen(first)) {
                 if (node.params.length === 1 &&
@@ -47,18 +47,16 @@ module.exports = function(context) {
                 ) {
                     context.report(
                         node,
-                        "remove redundant parens of the argument list.");
+                        "remove redundant parens of the argument list.")
                 }
             }
-            else {
-                if (!isOpenParen(before) || !isSameLine(before, first)) {
-                    context.report(
-                        node,
-                        "enclose the argument with parens.");
-                }
+            else if (!isOpenParen(before) || !isSameLine(before, first)) {
+                context.report(
+                    node,
+                    "enclose the argument with parens.")
             }
-        }
-    };
-};
+        },
+    }
+}
 
-module.exports.schema = [];
+module.exports.schema = []