Bump webpack-bundle-analyzer from 2.13.1 to 3.0.4

Bumps [webpack-bundle-analyzer](https://github.com/webpack-contrib/webpack-bundle-analyzer) from 2.13.1 to 3.0.4.
- [Release notes](https://github.com/webpack-contrib/webpack-bundle-analyzer/releases)
- [Changelog](https://github.com/webpack-contrib/webpack-bundle-analyzer/blob/master/CHANGELOG.md)
- [Commits](webpack/webpack-bundle-analyzer@v2.13.1...v3.0.4)

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

Author: dependabot-support

package-lock.json

@@ -50,7 +50,7 @@
     "eslint": "^4.11.0",
     "eslint-config-egg": "^6.0.0",
     "fecs": "^1.6.4",
-    "file-loader": "^2.0.0",
+    "file-loader": "^3.0.1",
     "html-webpack-plugin": "^3.2.0",
     "node-sass": "^4.9.2",
     "pinyin": "^2.8.3",