build(deps): bump @angular/fire from 6.1.4 to 6.1.5

Bumps [@angular/fire](https://github.com/angular/angularfire) from 6.1.4 to 6.1.5.
- [Release notes](https://github.com/angular/angularfire/releases)
- [Changelog](https://github.com/angular/angularfire/blob/master/CHANGELOG.md)
- [Commits](angular/angularfire@6.1.4...6.1.5)

---
updated-dependencies:
- dependency-name: "@angular/fire"
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

package-lock.json

@@ -18,7 +18,7 @@
     "@angular/common": "^11.0.0",
     "@angular/compiler": "^11.0.0",
     "@angular/core": "^11.0.0",
-    "@angular/fire": "^6.1.4",
+    "@angular/fire": "^6.1.5",
     "@angular/flex-layout": "^11.0.0-beta.33",
     "@angular/forms": "^11.0.0",
     "@angular/material": "^11.0.0",