Bump loopback-component-explorer from 5.3.0 to 5.4.0

Bumps [loopback-component-explorer](https://github.com/strongloop/loopback-component-explorer) from 5.3.0 to 5.4.0.
- [Release notes](https://github.com/strongloop/loopback-component-explorer/releases)
- [Changelog](https://github.com/strongloop/loopback-component-explorer/blob/master/CHANGES.md)
- [Commits](strongloop/loopback-component-explorer@v5.3.0...v5.4.0)

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

Author: dependabot-support