3.3.1 Release

What's Changed

• codecov yml && static-analysis badge by @Jurj-Bogdan in #17
• codecov config name by @Jurj-Bogdan in #18
• codecov update by @Jurj-Bogdan in #19
• Codecov config by @Jurj-Bogdan in #20
• added codecov badge by @Jurj-Bogdan in #24
• Issue #25: Bumped psr/http-message to ^1.0 || ^2.0 by @alexmerlin in #26

Full Changelog: 3.3.0...3.3.1