SEPA Payment Processor 1.1-alpha1

New features

• [#7][#14] PHP8 comptibility by @sebbrandt87 and @bjendres

Bugfixes / Compatibility

• [#3] Cycle day not set by @bjendres
• [#13] Fixed text domain for translations by @bastienho

Full Changelog: Project60/org.project60.sepa@1.0.0...1.1-alpha1