Merge pull request #17 from kareefardi/main

Rename `METAL1` to `Metal1` in all cells `lef` to match the `techlef`
tree: d9831843756344cdb9a72a9ea1ee741e86c67bb8
  1. .github/
  2. cells/
  3. docs/
  4. liberty/
  5. tech/
  6. AUTHORS
  7. LICENSE
  8. README.rst