v1.2.2
[io_engine] Remove duplicate code in tests
[build] Update roaring to 0.11.0
[io_engine] Shortcut the io::ErrorKind::Other creation
[io_engine] Remove unmaintained safemem dependency
[all] Apply cargo fmt, and fix clippy lints
[thin_check] Remove unused variables
[sync io engine] Merge ios that have small gaps between them.
[all] Fix clippy lints