fix build step (#69)

Author: mindofmar

package.json

@@ -6,7 +6,7 @@
   "scripts": {
     "dev:chrome": "cross-env TARGET_BROWSER=chrome webpack --config webpack/webpack.dev.js --watch",
     "build:chrome": "npm run clean && cross-env TARGET_BROWSER=chrome webpack --config webpack/webpack.prod.js",
-    "zip:chrome": "web-ext build -s dist/chrome -a dist -n wg-v$npm_package_version.zip -o",
+    "zip:chrome": "web-ext build -s dist/chrome -a dist -n chrome.zip -o",
     "clean": "rimraf dist",
     "test": "npx jest"
   },