v0.4.44-nightly

What's Changed

Build/Testing/CI

• [ci] fix gcov install failed (#1013) by @PsiACE
• [ci] add basic build cache (#1005) by @PsiACE
• [store] test: add test for meta-op DeleteKV (#1007) by @drmingdrmer

Dependency Updates

• Bump structopt from 0.3.21 to 0.3.22 (#1002) by @dependabot[bot]
• Bump tokio from 1.7.1 to 1.8.0 (#1001) by @dependabot[bot]

Documentation

• docs: update the rustc version (#1009) by @bohutang
• docs: add show create table to document (#1006) by @bohutang

Features

• [common/metatypes] feature: make match_seq() a generic method (#998) by @drmingdrmer

Improvement

• [doc] refine: add star gazers trend (#1008) by @drmingdrmer
• [store] test: add test for meta-op DeleteKV (#1007) by @drmingdrmer
• [store] refactor: simplify user-apis with map_err_to_code() and MatchSeq (#996) by @drmingdrmer