Version bump for 4.20

Needed by
https://git.eclipse.org/r/c/equinox/rt.equinox.bundles/+/177602

Change-Id: Ib87cb1c7a6021fa26eda658aecb94e962a2f3a0c
Signed-off-by: Alexander Kurtakov <akurtako@redhat.com>
2 files changed