Configure CI to test with Java 8, 11, 16, and 17-EA

[cescoffier]

No description provided.

[codecov]

Codecov Report

Merging #651 (ad29f96) into main (5a30316) will increase coverage by 0.38%.
The diff coverage is n/a.

❗ Current head ad29f96 differs from pull request most recent head f61684a. Consider uploading reports for the commit f61684a to get more accurate results

@@             Coverage Diff              @@
##               main     #651      +/-   ##
============================================
+ Coverage     89.88%   90.26%   +0.38%     
- Complexity     3020     3030      +10     
============================================
  Files           395      395              
  Lines         11829    11829              
  Branches       1478     1480       +2     
============================================
+ Hits          10633    10678      +45     
+ Misses          615      589      -26     
+ Partials        581      562      -19     

Impacted Files	Coverage Δ
...allrye/mutiny/operators/uni/UniAndCombination.java	89.53% <0.00%> (+1.16%)	⬆️
...mallrye/mutiny/operators/multi/MultiFlatMapOp.java	85.98% <0.00%> (+1.55%)	⬆️
...java/io/smallrye/mutiny/helpers/Subscriptions.java	80.66% <0.00%> (+1.65%)	⬆️
...y/operators/multi/processors/UnicastProcessor.java	97.34% <0.00%> (+1.76%)	⬆️
...io/smallrye/mutiny/operators/uni/UniMemoizeOp.java	95.04% <0.00%> (+1.98%)	⬆️
...y/operators/multi/builders/IterableBasedMulti.java	84.04% <0.00%> (+2.12%)	⬆️
.../io/smallrye/mutiny/helpers/queues/DrainUtils.java	77.77% <0.00%> (+2.22%)	⬆️
...subscription/SwitchableSubscriptionSubscriber.java	97.54% <0.00%> (+2.45%)	⬆️
...tiny/operators/multi/MultiBufferWithTimeoutOp.java	75.63% <0.00%> (+2.52%)	⬆️
...perators/multi/processors/SerializedProcessor.java	91.08% <0.00%> (+2.97%)	⬆️
... and 5 more