build(deps-dev): bump ts-loader from 6.2.2 to 7.0.4

Bumps [ts-loader](https://github.com/TypeStrong/ts-loader) from 6.2.2 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](TypeStrong/ts-loader@v6.2.2...v7.0.4)

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

Author: dependabot-preview[bot]

package-lock.json

@@ -61,7 +61,7 @@
     "rimraf": "3.0.2",
     "standard-version": "7.1.0",
     "ts-jest": "25.5.1",
-    "ts-loader": "6.2.2",
+    "ts-loader": "7.0.4",
     "ts-node": "8.10.1",
     "tslint": "6.1.2",
     "typescript": "3.8.3"