Update rocksdb requirement from 0.18.0 to 0.20.1

[dependabot[bot]]

Updates the requirements on rocksdb to permit the latest version.

Release notes

Sourced from rocksdb's releases.

v0.20.1

What's Changed

• Fix compatibility with MSRV 1.60.0 (aleksuss) in rust-rocksdb/rust-rocksdb#741

Full Changelog: https://github.com/rust-rocksdb/rust-rocksdb/compare/v0.20.0...v0.20.1

Changelog

Sourced from rocksdb's changelog.

0.20.1 (2023-02-10)

• Fix supporting MSRV 1.60.0 (aleksuss)

0.20.0 (2023-02-09)

• Support RocksDB 7.x BackupEngineOptions (exabytes18)
• Fix int128 compatibility check (Dirreke)
• Add Options::load_latest method to load the latest options from RockDB (Congyuwang)
• Bump bindgen to 0.64.0 (cwlittle)
• Bump rocksdb to 7.9.2 (kwek20)
• Make set_snapshot method public (a14e)
• Add drop_cf function to TransactionDB (bothra90)
• Bump rocksdb to 7.8.3 (aleksuss)
• Add doc for set_cache_index_and_filter_blocks (guerinoni)
• Re-run build.rs if env vars change (drahnr)
• Add WriteBatch::data method (w41ter)
• Add DB::open_cf_with_opts method (w41ter)
• Use lz4-sys crate rather then submodule (niklasf)
• Make create_new_backup_flush generic (minshao)

0.19.0 (2022-08-05)

• Add support for building with io_uring on Linux (parazyd)
• Change iterators to return Result (mina86)
• Support RocksDB transaction (yiyuanliu)
• Avoid pulling in dependencies via static feature flag (niklasf)
• Bump rocksdb to 7.4.4 (niklasf)
• Bump tikv-jemalloc-sys to 0.5 (niklasf)
• Update set_use_fsync comment (nazar-pc)
• Introduce ReadOptions::set_iterate_range and PrefixRange (mina86)
• Bump rocksdb to 7.4.3 (aleksuss)
• Don’t hold onto ReadOptions.inner when iterating (mina86)
• Bump zstd-sys from 1.6 to 2.0 (slightknack)
• Enable a building on the iOS platform (dignifiedquire)
• Add DBRawIteratorWithThreadMode::item method (mina86)
• Use NonNull in DBRawIteratorWithThreadMode (mina86)
• Tiny refactoring including fix for UB (niklasf)
• Add batched version MultiGet API (yhchiang-sol)
• Upgrade to rocksdb v7.3.1 (yhchiang-sol)
• Consistently use ffi_util::to_cpath to convert Path to CString (mina86)
• Convert properties to &CStr (mina86)
• Allow passing &CStr arguments (mina86)
• Fix memory leak when reading properties and avoid memory allocation (mina86)
• Fix Windows UTF-8 build flag (rajivshah3)
• Use more target features to build librocksdb-sys (niklasf)
• Fix bz_internal_error symbol multiply defined (nanpuyue)
• Bump rocksdb to 7.1.2 (dignifiedquire)
• Add BlobDB options (dignifiedquire)
• Add snapshot PinnableSlice based API (zheland)

... (truncated)

Commits

• 7319f25 Release 0.20.1 (#742)
• e646999 Check in CI compatibility with MSRV (#741)
• 1c879f0 Release 0.20.0 (#736)
• 2823760 Support RocksDB 7.x BackupEngineOptions (#700)
• 3805d1f Fix int128 compatibility check (#682)
• dc18b52 Revert "Allow to pass in owned variable for Decision::Change variant in compa...
• b8b4cf3 Add Options::load_latest() method to load latest options from RockDB path (#724)
• 548b425 Bump bindgen 0.63.0 -> 0.64.0 (#734)
• c1314a3 Bump rocksdb to 7.9.2 (#726)
• 5ed1043 Allow to pass in owned variable for Decision::Change variant in compaction fi...
• Additional commits viewable in compare view

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