Tag for v4.0.1 version

Tag for the v4.0.0

add plugin/Scala/lib/modules/** to sbt classpath in tests #SCL-21681

[idea installer] support installing intellij from .dmg files on macOS

[file downloader] fix logging of 100% download progress when there is…

… an off-by-1 file size estimation error

Disable parallel test execution

added PackagingMethod.PluginModule for plugin model v2 #SCL-21681

save better method to calculate mergeInto package method

product-info: make versionSuffix field optional

Release versions don't have the suffix field; others may have "EAP", "RC", etc.

Tag for the v4.0.0-RC16 release