Reverted dependency upgrade to SLF4J API
Reverted dependency upgrade to SLF4J API

Upgrading the SLF4J API could introduce NOP behavior when
dependent programs are running (verified with scb-java-client-utilities)
if their application doesn't support the 2.0.0 API of SLF4J
dannil/scb-java-client,dannil/scb-java-client