Merge pull request #29 from StijnKlopper2k/1.1

Upgrade deprecated actions/cache in workflow to v4

Prevent deprecation warnings (#28)

added php8.1 to CI

replaced deprecated create_function

Merge pull request #23 from nutama/php7.4

php 7.4 compatibility

Fixed the create_function deprecation.

Fix error count(): Parameter must implement Countable

sfPatternRouting 7.2 compat

Fixed php7.2 deprecation

Fix counting on null in sfValidatorConfigHandler