build(deps-dev): bump karma-coverage-istanbul-reporter

Bumps [karma-coverage-istanbul-reporter](https://github.com/mattlewis92/karma-coverage-istanbul-reporter) from 2.0.5 to 2.1.0.
- [Release notes](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/releases)
- [Changelog](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/blob/master/CHANGELOG.md)
- [Commits](mattlewis92/karma-coverage-istanbul-reporter@v2.0.5...v2.1.0)

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

package.json

@@ -63,7 +63,7 @@
     "jasmine-spec-reporter": "~4.2.1",
     "karma": "^4.2.0",
     "karma-chrome-launcher": "~2.2.0",
-    "karma-coverage-istanbul-reporter": "^2.0.5",
+    "karma-coverage-istanbul-reporter": "^2.1.0",
     "karma-jasmine": "^2.0.1",
     "karma-jasmine-html-reporter": "^1.4.2",
     "ng-packagr": "^5.3.0",