v0.50.7-piplabs-v0.20

What's Changed

• feat(staking): move singularity height to staking module by @0xHansLee in #23
• chore(evidence): bump cosmos sdk version by @0xHansLee in #24
• fix(slashing): reset missed block counter at singularity block by @0xHansLee in #25

Full Changelog: v0.50.7-piplabs-v0.18...v0.50.7-piplabs-v0.20