cmake 3.0.0

Closes #30066.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
cmake: update 3.0.0 bottle.
pypy3 (new formula)

Add formula for PyPy3-2.3.1, the first stable release of PyPy3.

Fixes #30334.
pypy3: add 2.3.1 bottle.