Bump class-transformer from 0.2.3 to 0.3.1 in /angular-src

Bumps [class-transformer](https://github.com/typestack/class-transformer) from 0.2.3 to 0.3.1.
- [Release notes](https://github.com/typestack/class-transformer/releases)
- [Changelog](https://github.com/typestack/class-transformer/blob/develop/CHANGELOG.md)
- [Commits](typestack/class-transformer@v0.2.3...v0.3.1)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

angular-src/package-lock.json

@@ -36,7 +36,7 @@
     "angularx-social-login": "^2.3.1",
     "bootstrap": "^4.5.2",
     "bootstrap-social": "^5.1.1",
-    "class-transformer": "^0.2.3",
+    "class-transformer": "^0.3.1",
     "class-transformer-validator": "^0.8.0",
     "class-validator": "^0.12.2",
     "core-js": "^3.6.5",