Make compatible with Composer v2#19

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dejury wants to merge 5 commits intokapersoft:masterfrom

brainpink:master

Commits on Nov 19, 2020

Make Composer v2 ready
Jonathan Hafkamp
committed
Change namespace to be compatible with Composer v2. Could be a breaking change.
Jonathan Hafkamp
committed

Commits on Feb 23, 2021

Change project name
Jonathan Hafkamp
committed
Bump Guzzle to 7
Jonathan Hafkamp
committed

Commits on Oct 12, 2021

Prepare upgrade to PHP8
Jonathan Hafkamp
committed