[irods/irods#6073] Bumped version to 4.2.12 (4-2-stable)

[korydraughn]

'd

[alanking]

Should we hold off on this in light of our release plans, or just go ahead and bump it?

[trel]

i think i vote bump it, b/c we'll forget and then confuse ourselves later. we can always come back and branch and... whatever.

[alanking]

Sold