Bump doorkeeper from 5.3.3 to 5.4.0 (#13733)

* Bump doorkeeper from 5.3.3 to 5.4.0

Bumps [doorkeeper](https://github.com/doorkeeper-gem/doorkeeper) from 5.3.3 to 5.4.0.
- [Release notes](https://github.com/doorkeeper-gem/doorkeeper/releases)
- [Changelog](https://github.com/doorkeeper-gem/doorkeeper/blob/master/CHANGELOG.md)
- [Commits](https://github.com/doorkeeper-gem/doorkeeper/compare/v5.3.3...v5.4.0)

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

* Fix tests

* Fix use of Doorkeeper::AccessToken.find_or_create_for

* Fix tests?

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>
Co-authored-by: Thibaut Girka <thib@sitedethib.com>

Gemfile.lock

@@ -194,7 +194,7 @@ GEM
     docile (1.3.2)
     domain_name (0.5.20190701)
       unf (>= 0.0.5, < 1.0.0)
-    doorkeeper (5.3.3)
+    doorkeeper (5.4.0)
       railties (>= 5)
     dotenv (2.7.5)
     dotenv-rails (2.7.5)
@@ -697,7 +697,7 @@ DEPENDENCIES
   devise-two-factor (~> 3.1)
   devise_pam_authenticatable2 (~> 9.2)
   discard (~> 1.2)
-  doorkeeper (~> 5.3)
+  doorkeeper (~> 5.4)
   dotenv-rails (~> 2.7)
   e2mmap (~> 0.1.0)
   fabrication (~> 2.21)