Changes:
````
Polished lint and tests
Added final lint and tests
Added basic lint and tests
fix redundant_pattern_matching lint
add lint futures_not_send
Integrate more idiomatic rust changes.
Fix issue #4892.
cargo dev fmt
Cleanup: Rename 'db' variable to 'diag'
question_mark: don't add `as_ref()` for a call expression
unit_arg suggestion may be incorrect
readme: update to cargo clippy --fix command
CI: performing system upgrade fixes broken apt deps on ubuntu 32bit
Do not lint in macros for match lints
[fix] Minor typo in GH Actions 'clippy_dev'
Reenable rustfmt integration test
Add test to map_flatten with an Option
Lint map_flatten if caller is an Option
Apply suggestions from code review
manually fixing formatting at this point lol
fmt
rename field
revert the damn fmt changes
add some tests
split it up for testing but the merge broke tests
dogfood tasted bad
fix rustfmt issue
boycott manish
check for unstable options
Start work on clippy-fix as subcommand
````
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