* fix: use monotonic time for timing code
`time.time()` depends on system clock which can drift away and get corrected
over time. If you're unlucky it will get corrected in your timing code
and give absurd results.
* test: dont check for status
can refresh and give wrong output
[skip ci]
refactor: clean up code to py39+ supported syntax
- f-strings instead of format
- latest typing support instead of pre 3.9 TitleCase
- remove UTF-8 declarations.
- many more changes
Powered by https://github.com/asottile/pyupgrade/ + manual cleanups
- Decoupled coverage code from testing to setup code coverage before any import happen to get accurate coverage (before it used to skip import statements for some files)
