More flexible devDependencies

Author: igorshubovych

package.json

@@ -65,10 +65,10 @@
     "wrench": "~1.5.8"
   },
   "devDependencies": {
-    "eslint": "~2.0.0",
-    "husky": "~0.10.2",
-    "mocha": "~2.4.5",
-    "should": "~8.2.2",
-    "sinon": "~1.17.2"
+    "eslint": "*",
+    "husky": "*",
+    "mocha": "*",
+    "should": "*",
+    "sinon": "*"
   }
 }