Merge branch 'fix/for-in'

Merges pull request #3

Author: mcmath

src/deep-map-keys.ts

@@ -43,8 +43,10 @@ function mapObject(obj: {[key: string]: any}, fn: MapFn, opts: Options): {[key:
   let result: {[key: string]: any} = {};
 
   for (let key in obj) {
-    let value = obj[key];
-    result[fn.call(opts.thisArg, key, value)] = map(value, fn, opts);
+    if (obj.hasOwnProperty(key)) {
+      let value = obj[key];
+      result[fn.call(opts.thisArg, key, value)] = map(value, fn, opts);
+    }
   }
 
   return result;

tslint.json

@@ -23,7 +23,7 @@
     }],
     "ban": false,
     "curly": false,
-    "forin": false,
+    "forin": true,
     "label-position": true,
     "no-arg": true,
     "no-bitwise": false,