v0.12.2

What's Changed

• add changelog for 0.12.0 and 0.12.1 by @cpanato in #1064
• add description on /api/v1/index/retrieve endpoint by @bobcallaway in #1073
• Adding e2e test coverage by @cdris in #1071
• export rekor build/version information by @cpanato in #1074
• Use POST instead of GET for /api/log/entries/retrieve metrics. by @var-sdk in #1083
• Search through all shards when searching by hash by @priyawadhwa in #1082

Full Changelog: v0.12.1...v0.12.2