fix: don't hold lock when calling listeners

[ndyakov]

Fixes #11

[htemelski-oss]

Looks good to me
Is there an easy way to replicate the issue in a test?

[ndyakov]

@htemelski-redis I added a test and fixed the potential data race

[github-actions]

Merging this branch will increase overall coverage

Impacted Packages	Coverage Δ	🤖
github.com/redis/go-redis-entraid	96.81% (+3.48%)	👍

---

Coverage by file

Changed files (no unit tests)

Changed File	Coverage Δ	Total	Covered	Missed	🤖
github.com/redis/go-redis-entraid/credentials_provider.go	96.36% (+6.17%)	55 (+4)	53 (+7)	2 (-3)	👍

Please note that the "Total", "Covered", and "Missed" counts above refer to code statements instead of lines of code. The value in brackets refers to the test coverage of that file in the old version of the code.

Changed unit test files

• github.com/redis/go-redis-entraid/credentials_provider_test.go