gifn-apply: switch to hatchling for the PEP517 build

Also, let hatch obtain the version from the defs.py file by itself.

Change-Id: Ieb308873a4f63bea794fce15ce02fa1b8bf56b41
1 file changed
tree: 367f0010f754a5c2031bf85a14d57123c6b1ab18
  1. .gitreview
  2. patches/
  3. tools/