`.lef` file improvements.

 * Fixing missing VNB / VPB pins in `.lef` files.
 * Removing `UNITS` section.

Updating sky130_fd_sc_hs 0.0.2.

Signed-off-by: Tim 'mithro' Ansell <me@mith.ro>
tree: fd6e85c7266f56be7dd189e97d2dd6f19d6bae4d
  1. cells/
  2. models/
  3. tech/
  4. timing/
  5. .gitignore
  6. LICENSE
  7. README.rst