Merge pull request #15 from kareefardi/main

Rename `METAL1` to `Metal1` in all cells `lef` to match the `techlef`
tree: 87700e54cb8ea73d82d1f6a33e3600133d380ace
  1. .github/
  2. cells/
  3. docs/
  4. liberty/
  5. tech/
  6. AUTHORS
  7. LICENSE
  8. README.rst