Consider relicensing CC0 code to another license (MIT?)

[Conan-Kudo]

Parts of this project have code under the CC0 license. However, Fedora changed its policy last year on CC0 for code such that it's not longer permitted. The reasoning can be viewed here.

Would you please consider relicensing the code under CC0-1.0 to MIT to align it with the rest of the project?

[checklist below is by @mr-c ]

• [ ] https://github.com/nemequ/portable-snippets/
• [ ] https://github.com/nemequ/hedley , see https://github.com/nemequ/hedley/issues/56

The remaining files that would need dual-licensing are

• amalgamate.py
  • [ ] @nemequ
  • [x] @tlively
• simde/simde-align.h
  • [ ] @nemequ
  • [ ] @jsbache
• simde/simde-arch.h
  • [ ] @nemequ
  • [ ] @himanshi18037
  • [x] @rosbif
  • [x] @FlyGoat
  • [x] @ashnewmanjones
  • [x] @ktgw0316
  • [x] @makise-homura
  • [x] @simba611
  • [x] @tommyvct
  • [ ] @Glitch18
  • [x] @dhbloo
• simde/simde-detect-clang.h
  • [ ] @nemequ
  • [x] @mr-c
• simde/simde-f16.h
  • [ ] contains portions by @nemequ
  • [ ] that are heavily based upon CC0 code by @rygorous