Bump source-map-explorer from 1.8.0 to 2.5.3 in /services/idp

Bumps [source-map-explorer](https://github.com/danvk/source-map-explorer) from 1.8.0 to 2.5.3.
- [Release notes](https://github.com/danvk/source-map-explorer/releases)
- [Commits](https://github.com/danvk/source-map-explorer/compare/v1.8.0...v2.5.3)

---
updated-dependencies:
- dependency-name: source-map-explorer
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

services/idp/package.json

@@ -147,7 +147,7 @@
     "resolve": "1.18.1",
     "resolve-url-loader": "^3.1.2",
     "sass-loader": "^10.0.5",
-    "source-map-explorer": "^1.8.0",
+    "source-map-explorer": "^2.5.3",
     "typescript": "^4.1.2",
     "url-loader": "4.1.1",
     "webpack": "4.46.0",