Chore: Relax peerDependencies (#30)

Works fine with ESLint 4

Author: sapegin

package.json

@@ -30,7 +30,7 @@
     "jest-docblock": "^20.0.1"
   },
   "peerDependencies": {
-    "eslint": "^3.14.1",
+    "eslint": ">=3.14.1",
     "prettier": ">= 0.11.0"
   },
   "devDependencies": {