flag v3 as maintenance, add CTA for v4

Author: bholloway

packages/resolve-url-loader/README.md

@@ -1,3 +1,9 @@
+> **I M P O R T A N T**
+>
+> Version 4 release is imminent. Please try it. More info on the [homepage](https://github.com/bholloway/resolve-url-loader).
+>
+> Version 3 is now in maintenance mode.
+
 # Resolve URL Loader
 
 [![NPM](https://nodei.co/npm/resolve-url-loader.png)](https://www.npmjs.com/package/resolve-url-loader)

packages/resolve-url-loader/package.json

@@ -5,7 +5,8 @@
   "main": "index.js",
   "repository": {
     "type": "git",
-    "url": "git+https://github.com/bholloway/resolve-url-loader.git"
+    "url": "git+https://github.com/bholloway/resolve-url-loader.git",
+    "directory": "packages/resolve-url-loader"
   },
   "keywords": [
     "webpack",
@@ -24,7 +25,7 @@
   "bugs": {
     "url": "https://github.com/bholloway/resolve-url-loader/issues"
   },
-  "homepage": "https://github.com/bholloway/resolve-url-loader",
+  "homepage": "https://github.com/bholloway/resolve-url-loader/tree/v3-maintenance/packages/resolve-url-loader",
   "engines": {
     "node": ">=6.0.0"
   },