Upgrade phpUnit version

Merge pull request #29 from GetResponse/pburant/grsd-47340

chore: GRSD-47340 upgrade phpunit to safe version

7.0.4

Merge branch 'develop' into 'master'

Develop -> Master

See merge request integrations/share-code-plugin!64

Added doctype for php8.1 compatibility

7.0.3

GRINTEGRAT-4628 - added doctype for php8.1 compatibility + fix unit t…

7.0.1

BugFix: Prevent from update'ing order not existing in order map

6.0.1

Refactoring

• Merging custom fields

6.0.0

Refactoring

• Mostly, Changed code structure

5.0.3

Merge branch 'develop' into 'master'

Develop

See merge request integrations/share-code-plugin!46

5.0.2

Merge branch 'develop' into 'master'

Develop

See merge request integrations/share-code-plugin!44

5.0.1

Bugfixes

• prevent from sending contacts with empty name, contact list or email

5.0.0

• Added cache to cart service
• Added ContactCustomFields to Contact