moved eslint configuration to package.json (#4571)

This should help in the efforts of keeping the root directory clean.

.eslintrc

@@ -1,21 +0,0 @@
-{
-  "globals": {
-    "L": true,
-  },
-  "env": {
-    "commonjs": true,
-    "amd": true,
-    "node": false
-  },
-  "extends": "mourner",
-  "rules": {
-    "no-mixed-spaces-and-tabs": [2, "smart-tabs"],
-    "indent": [2, "tab", {"VariableDeclarator": 0}],
-    "curly": 2,
-    "spaced-comment": 2,
-    "strict": 0,
-    "wrap-iife": 0,
-    "key-spacing": 0,
-    "consistent-return": 0
-  }
-}

Jakefile.js

@@ -43,7 +43,7 @@ function calculateVersion(officialRelease, callback) {
 }
 
 desc('Check Leaflet source for errors with ESLint');
-task('lint', {async: true}, hint('Checking for JS errors...', 'src --config .eslintrc'));
+task('lint', {async: true}, hint('Checking for JS errors...', 'src --config package.json'));
 
 desc('Check Leaflet specs source for errors with ESLint');
 task('lintspec', {async: true}, hint('Checking for specs JS errors...', 'spec/suites --config spec/.eslintrc'));

package.json

@@ -29,6 +29,27 @@
     "build": "jake build",
     "release": "./build/publish.sh"
   },
+  "eslintConfig": {
+    "globals": {
+      "L": true
+    },
+    "env": {
+      "commonjs": true,
+      "amd": true,
+      "node": false
+    },
+    "extends": "mourner",
+    "rules": {
+      "no-mixed-spaces-and-tabs": [2, "smart-tabs"],
+      "indent": [2, "tab", {"VariableDeclarator": 0}],
+      "curly": 2,
+      "spaced-comment": 2,
+      "strict": 0,
+      "wrap-iife": 0,
+      "key-spacing": 0,
+      "consistent-return": 0
+    }
+  },
   "repository": {
     "type": "git",
     "url": "git://github.com/Leaflet/Leaflet.git"