Bump ngx-bootstrap from 8.0.0 to 18.1.2

Bumps [ngx-bootstrap](https://github.com/valor-software/ngx-bootstrap) from 8.0.0 to 18.1.2.
- [Release notes](https://github.com/valor-software/ngx-bootstrap/releases)
- [Changelog](https://github.com/valor-software/ngx-bootstrap/blob/development/CHANGELOG.md)
- [Commits](valor-software/ngx-bootstrap@v8.0.0...v18.1.2)

---
updated-dependencies:
- dependency-name: ngx-bootstrap
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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