Create sbt submodules per scala version #2057
Merged
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This allows us to run the compile / test all modules for a given Scala version which makes dev experience a bit better. e.g., to run all the test suites for Scala 3, all we need to run is
sbt ++3.3.1 rootJVM3/test
.In addition to improving dev experience, it also makes CI run faster as SBT can parallelise the compiling of SBT modules & test execution