Fix ping command

• Pass Client to Ping command #73

Drop dependency on concrete HTTP implementation

• Drop dependency on concrete HTTP implementation [ch27450] (#70)

2.2.4

Commits

• [99bafae] - Propagate client instance to all items of array response (#68) (slepic)
• [a11347d] - Add delete all invoices method (#67) (Dmitry Davidov)
• [4e2ad7e] - master -> main [ch23227] (#66) (Petr Kopac)
• [7df8eb5] - Ubuntu to 18.04, PHP 7.4 (Travis) [ch21988] (#64) (Petr Kopac)

Use correct operator (elvis operator)

Commits

• [fa838d2] - use correct operator (elvis operator) (#63) (Mohamad Bahamdain)
• [e670fc5] - Work e-mail in metadata (Petr Kopac)

Update dependencies

• Update dependencies [ch19723] (#62)

Fix method signature change

2.2.1

Remove return type declaration (#61)

Plan Group API

• Provide support for Plan Group API [ch19607] (#58)
• Return annotation fix & return type (#57)
• Small Typos (Thank you) (#56)

Add support for subcription sets

• Add support for subcription sets (#54)

Support subscription sets

• Support subscription sets [ch16280] (#55)

Document customer_external_id field

• Document customer_external_id field [ch15586] (#53)
• Unit test for POST Invoice reacts on 422 correctly (#52)
• build maintenance (#50, #51)