Bump laravel/telescope from 5.3.0 to 5.4.0 (#1836)

Bumps [laravel/telescope](https://github.com/laravel/telescope) from 5.3.0 to 5.4.0.
- [Release notes](https://github.com/laravel/telescope/releases)
- [Changelog](https://github.com/laravel/telescope/blob/5.x/CHANGELOG.md)
- [Commits](laravel/telescope@v5.3.0...v5.4.0)

---
updated-dependencies:
- dependency-name: laravel/telescope
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>