Release 1.3.0-rc (googleforgames#1275)

This includes some update to the release checklist for the new npm
publishing tools.

There is a reference to a target that has yet to be written
(`publish-sdk-packages`), but will be done with the upcoming release
right after this is merged, and will come in a following PR. Basically,
to test it I need to run it at this stage, so it makes sense to do it
together.

Release 1.2.0 (googleforgames#1230)

Release 1.2.0-rc (googleforgames#1206)

Release 1.1.0 (googleforgames#1161)

Release 1.1.0-rc (googleforgames#1134)

Release 1.0.0 (googleforgames#1059)

Pretty awesome.

Release 1.0.0 Release Candidate (googleforgames#1054)

🎉

Release 0.12.0 (googleforgames#983)

Typo in the changelog. (googleforgames#974)

Release 0.11.0 (googleforgames#850)

Update work for 0.11.0

Also had to include some updates to fix some site link checking, since
adding a new release pushed us into pagination, which has some issues
we will need to push up to Hugo to fix - but are easily overridable for
now.