Revert logback-classic to 1.3.X to work with JDK 8

[nkramer44]

I noticed after dependabot bumped logback-classic from 1.3.x to 1.4.x that logging stopped working and I saw this warning: Failed to load class org.slf4j.impl.StaticLoggerBinder. According to https://www.slf4j.org/codes.html#StaticLoggerBinder, logback-classic 1.4.x targets slf4j v2.x.x, so I tried to bump slf4j to v2.0.9 and logback-classic to 1.4.x. However, logback-classic 1.4.x supports JDK 11 and up, not JDK 8, which we try to support in xrpl4j. Therefore, I downgraded logback-classic to the latest 1.3.x and bumped slf4j to v2.0.7 based on https://logback.qos.ch/download.html

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (24bf996) 91.61% compared to head (aab7856) 91.65%.

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #509      +/-   ##
============================================
+ Coverage     91.61%   91.65%   +0.04%     
  Complexity     1774     1774              
============================================
  Files           365      365              
  Lines          4948     4948              
  Branches        408      408              
============================================
+ Hits           4533     4535       +2     
+ Misses          282      280       -2     
  Partials        133      133              

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