Version bumps for 4.21 Needed by https://git.eclipse.org/r/c/platform/eclipse.platform.debug/+/172237 Change-Id: If194f8dd861a957714967a87e8036a6275e9ae47 Signed-off-by: Alexander Kurtakov <akurtako@redhat.com> Reviewed-on: https://git.eclipse.org/r/c/platform/eclipse.platform.debug/+/183215 Tested-by: Platform Bot <platform-bot@eclipse.org>