build(deps): bump ts-loader from 6.2.1 to 7.0.4 (#838)

Bumps [ts-loader](https://github.com/TypeStrong/ts-loader) from 6.2.1 to 7.0.4.
- [Release notes](https://github.com/TypeStrong/ts-loader/releases)
- [Changelog](https://github.com/TypeStrong/ts-loader/blob/master/CHANGELOG.md)
- [Commits](https://github.com/TypeStrong/ts-loader/compare/v6.2.1...v7.0.4)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

packages/cli/package.json

@@ -62,7 +62,7 @@
     "rollup-plugin-postcss": "^2.5.0",
     "rollup-plugin-typescript2": "^0.26.0",
     "tar": "^6.0.1",
-    "ts-loader": "^6.2.1",
+    "ts-loader": "^7.0.4",
     "webpack": "^4.41.6",
     "webpack-dev-server": "^3.10.3"
   },