Bump webpack-bundle-tracker from 0.2.0 to 0.3.0 (#48)

Bumps [webpack-bundle-tracker](https://github.com/owais/webpack-bundle-tracker) from 0.2.0 to 0.3.0.
- [Release notes](https://github.com/owais/webpack-bundle-tracker/releases)
- [Commits](https://github.com/owais/webpack-bundle-tracker/commits/v0.3.0)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Author: dependabot[bot]

package-lock.json

@@ -36,7 +36,7 @@
     "file-loader": "^0.11.2",
     "style-loader": "^0.18.2",
     "url-loader": "^0.5.8",
-    "webpack-bundle-tracker": "^0.2.0"
+    "webpack-bundle-tracker": "^0.3.0"
   },
   "engines": {
     "node": "8.4.x"