update bundled Kotlin plugin to 1.3.50-release-IJ2019.2-1 (IDEA-220738)
update bundled Kotlin plugin to 1.3.50-release-IJ2019.2-1 (IDEA-220738)

GitOrigin-RevId: 597b2be69d41993eff94b532d322a75ed0bfbba1
allotria/intellij-community,allotria/intellij-community,allotria/intellij-community,allotria/intellij-community,allotria/intellij-community,allotria/intellij-community,allotria/intellij-community,allotria/intellij-community,allotria/intellij-community,allotria/intellij-community,allotria/intellij-community,allotria/intellij-community,allotria/intellij-community