Version `1.8.2` introduces `slf4j-simple` dependency about postmark-java

[ibalosh]

Hi @ivansenic

thank you for reporting this, we decided to keep things simple, and remove the dependency. Change is visible in 1.8.3 version, released today.

[ibalosh]

I see, thank you for contacting us. The library itself is not using slf4j explicitly, so we could remove the lightweight logger from the dependency list. Then again, with SpringBoot, if we would use other logging framework in future for our library, it could generate multiple binding issue too.

In case you are using SpringBoot, wouldn't there be an option to exclude the dependency on your project side, instead of doing that on the library? This would eliminate the error and it would not break the usage. We could make a change to the library, but we want to make sure that we are adapting it to general java audience, rather than focusing on specific frameworks.