Added logr as logging Library provider

[mcdoker18]

Closes #473
Closes #430

[johanbrandhorst]

This looks great to me, but would love input from @bwplotka.

[codecov-commenter]

Codecov Report

Merging #510 (00c2b32) into v2 (6e2c2ac) will decrease coverage by 25.52%.
The diff coverage is 50.46%.

@@             Coverage Diff             @@
##               v2     #510       +/-   ##
===========================================
- Coverage   84.01%   58.48%   -25.53%     
===========================================
  Files          30       30               
  Lines         932     1573      +641     
===========================================
+ Hits          783      920      +137     
- Misses        110      590      +480     
- Partials       39       63       +24     

Impacted Files	Coverage Δ
chain.go	0.00% <ø> (-90.91%)	⬇️
interceptors/auth/auth.go	100.00% <ø> (ø)
interceptors/ratelimit/ratelimit.go	60.00% <0.00%> (-40.00%)	⬇️
interceptors/recovery/options.go	78.57% <ø> (ø)
metadata/single_key.go	60.00% <ø> (ø)
testing/testpb/interceptor_suite.go	0.00% <0.00%> (ø)
testing/testpb/test.manual_validator.pb.go	0.00% <0.00%> (ø)
util/backoffutils/backoff.go	60.00% <ø> (ø)
wrappers.go	66.66% <ø> (-33.34%)	⬇️
interceptors/reporter.go	45.45% <20.00%> (-17.05%)	⬇️
... and 27 more

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[mcdoker18]

@johanbrandhorst Can you please help me with the failed linter job?

cannot lint and format files: you have unstaged changes.
M	providers/logr/examples_test.go
M	providers/logr/logger.go
M	providers/logr/logger_test.go
Please commit or stash them.

If it's a flaky job I can't restart it.

[johanbrandhorst]

I'm guessing it's just a bad error and it's trying to tell us that there was a file formatting diff. Can you try formatting those files?

[mcdoker18]

I'm guessing it's just a bad error and it's trying to tell us that there was a file formatting diff. Can you try formatting those files?

Done, thanks!

[bwplotka]

👍🏽

[bwplotka]

Thanks!