Chore: return peerDeps since they are valid

Author: qfox

package.json

@@ -33,8 +33,8 @@
     "jshint": "^2.7.0",
     "mocha": "^2.2.4"
   },
-  "_peerDependencies": {
-    "jscs": ">=1.8.0 <2.0"
+  "peerDependencies": {
+    "jscs": ">=1.8.0"
   },
   "scripts": {
     "lint": "jshint lib test && jscs lib test",