bump version

update README.md (matomo-org#6961)

Co-authored-by: sgiehl <[email protected]>

update php requirement

Prepare new major release

update README.md (matomo-org#6862)

Co-authored-by: sgiehl <[email protected]>

Ensure userAgent is always of type string

Update DeviceDetector.php

prepare 4.2.2

prepare 4.2.1

update README.md (matomo-org#6688)

Co-authored-by: sgiehl <[email protected]>