Fixed ReflectionClass::getInterfaceClassNames()

[kukulich]

UnitEnum, BackedEnum and Stringable were missing

[Ocramius]

The ClassLikeStorageProvider crash in mutation tests is suspicious: did we change dependencies recently? 🤔

In ClassLikeStorageProvider.php line 45:
                                                                               
  Could not get class storage for roave\betterreflection\reflection\reflectio  
  nfunctionabstract                                                            
                                                                               

run [--test-framework TEST-FRAMEWORK] [--static-analysis-tool STATIC-ANALYSIS-TOOL] [--test-framework-options TEST-FRAMEWORK-OPTIONS] [--static-analysis-tool-options STATIC-ANALYSIS-TOOL-OPTIONS] [-j|--threads THREADS] [--with-uncovered] [-s|--show-mutations [SHOW-MUTATIONS]] [--no-progress] [--force-progress] [-c|--configuration CONFIGURATION] [--coverage COVERAGE] [--mutators MUTATORS] [--filter FILTER] [--git-diff-filter GIT-DIFF-FILTER] [--git-diff-lines] [--git-diff-base GIT-DIFF-BASE] [--formatter FORMATTER] [--logger-github [LOGGER-GITHUB]] [--id ID] [--map-source-class-to-test [MAP-SOURCE-CLASS-TO-TEST]] [--logger-gitlab [LOGGER-GITLAB]] [--logger-project-root-directory LOGGER-PROJECT-ROOT-DIRECTORY] [--logger-html LOGGER-HTML] [--logger-text LOGGER-TEXT] [--noop] [--only-covering-test-cases] [--min-msi MIN-MSI] [--min-covered-msi MIN-COVERED-MSI] [--log-verbosity LOG-VERBOSITY] [--initial-tests-php-options INITIAL-TESTS-PHP-OPTIONS] [--skip-initial-tests] [--ignore-msi-with-no-mutations [IGNORE-MSI-WITH-NO-MUTATIONS]] [--debug] [--dry-run]

Seems like we upgraded to 6.15.1 some days ago:

• BetterReflection/tools/composer.lock

  Lines 6311 to 6312 in 7f0e5fd

  	"name": "vimeo/psalm",
  	"version": "6.15.1",

• f3e83c7

Poking @danog before deciding whether we need an upstream issue 🤔

[kukulich]

The same problem is in other PRs as well: #1553