publish 4.0.0

- add explicit root-relative codecs
- BREAKING remove leading slash from project-relative codec encode() method, superceded by project-root-relative codec

Author: bholloway

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "adjust-sourcemap-loader",
-  "version": "3.0.0",
+  "version": "4.0.0",
   "description": "Webpack loader that adjusts source maps",
   "main": "index.js",
   "engines": {