config: update rustc version

perf: remove unnecessary nesting of merging iter and reduce clone during iteration

fix: `Bound::Excluded` may cause the read data to be empty

typo (#61)

perf: `merging_iter` remove excess key copies

perf: optimize mem_range

refactor: cancel seek return elements and optimize copying of write_buf in transaction iterators

fix: mem_table::range_scan lost data

fix: transaction_iter seek invalid & log load error

perf: reduce memory fragmentation generated during serialization and deserialization

update toolchain

perf: optimize transactions to repeatedly copy data when performing repeated iterative scans

fix: `Compaction` cannot be performed when writing continuous transactions

feat: implement `BloomFilter` to replace external dependencies (#59)

version up