New upstream version 1.7.0

package.json

 {
   "name": "convert-source-map",
-  "version": "1.6.0",
+  "version": "1.7.0",
   "description": "Converts a source-map from/to  different formats and allows adding/changing properties.",
   "main": "index.js",
   "scripts": {
@@ -37,5 +37,8 @@
   },
   "files": [
     "index.js"
-  ]
+  ],
+  "browser": {
+    "fs": false
+  }
 }