[PROJ] Motion: Promote 6.3.0 release candidates to final versions

[Kristian Evers]

PSC Members,

It appears that no major issues in the release candidates

  PROJ 6.3.0RC1
  proj-datumgrid-europe 1.5RC2
  proj-datumgrid-north-america 1.3RC1
  proj-datumgrid-oceania 1.1RC1

so I hereby motion that they all be promoted to final releases.

I’ll start with my +1.

/Kristian