Setup publishing to Sonatype OSSRH, for releasing to Maven Central

[nicmunroe]

No description provided.

[codecov]

Codecov Report

Merging #143 (7ea4d51) into main (0932d84) will decrease coverage by 0.06%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##               main     #143      +/-   ##
============================================
- Coverage     92.37%   92.30%   -0.07%     
+ Complexity     2514     2512       -2     
============================================
  Files           167      167              
  Lines          7276     7276              
  Branches        986      986              
============================================
- Hits           6721     6716       -5     
- Misses          364      366       +2     
- Partials        191      194       +3     

Impacted Files	Coverage Δ
...mpipeline/DownstreamIdleChannelTimeoutHandler.java	86.36% <0.00%> (-4.55%)	⬇️
...ient/asynchttp/netty/StreamingAsyncHttpClient.java	75.48% <0.00%> (-0.59%)	⬇️
...r/handler/ProxyRouterEndpointExecutionHandler.java	64.06% <0.00%> (-0.32%)	⬇️

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