Version bumps for 4.21 Needed by https://git.eclipse.org/r/c/platform/eclipse.platform.ua/+/173448 Change-Id: I2b4b2713f9552f73c20bafd8341f615b94a3cad6 Signed-off-by: Alexander Kurtakov <akurtako@redhat.com> Reviewed-on: https://git.eclipse.org/r/c/platform/eclipse.platform.ua/+/183212 Tested-by: Platform Bot <platform-bot@eclipse.org>