Lava v2.2.0 🌋

Changelog

Other work

• 617333f: add handler ( <>)
• 9348956: add upgrade handler for v2.2.0 ( <>)
• c66b36a: fix and add tests (#1480) (@Yaroms)
• 764e429: fix init_chain.sh (@oren-lava)
• c1358e6: fix slashing mechanism (#1488) (@Yaroms)
• c0670d0: remove making keyring-backend default value to "test" (@oren-lava)

Full Changelog: v2.0.0...v2.2.0