Plan for new version 3.0

[h4kuna]

• php 8.0+
• remove travis, enable github actions
• remove dependency on guzzlehttp/guzzle, add dependencies to PSR 7,17,18
• remove dependency on nette/safestream, add dependency on lock mechanism (arvenil/ninja-mutex or malkusch/lock)
• update API
• implement this issue #44

[h4kuna]

@foxycode the branche adamzelycz-master is complete. Could you test it?

• php 8.0+
• remove travis, enable github actions
• remove dependency on guzzlehttp/guzzle, add dependencies to PSR 7,17,18
• remove dependency on nette/safestream
  • keep it because, this is good solution
• update API FioPay and FioRead keep API
• implement this issue #44

[h4kuna]

Code coverage is 94%

[h4kuna]

released