Logging within the library

[mfvanek]

Consider to downgrade slf4j version to Spring Boot 2.7.x compatible

            library("logback-classic", "ch.qos.logback:logback-classic:1.4.11")
            library("slf4j-api", "org.slf4j:slf4j-api:2.0.9")

[mfvanek]

https://www.slf4j.org/manual.html#compatibility

[mfvanek]

See also spring-projects/spring-boot#12649

[mfvanek]

To avoid

> Task :spotbugsTest
Scanning archives (157 / 157)
2 analysis passes to perform
Pass 1: Analyzing classes (25 / 136) - 18% completeSLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.

[mfvanek]

spotbugs/spotbugs-gradle-plugin#133
spotbugs/spotbugs-gradle-plugin#136