pip: update pytool-library to ~=0.12.1 pytool-extensions to ~=0.20.0 (#…

…55)

## Description

- edk2-pytool-library 0.11.6 to 0.12.1 major changes:
  - path_utilities.py: Prevent path case modification in GetContainingModules()
  - path_utilities: Adjust GetContainingPackage() and Edk2Path behavior
  - path_utilities: Enhance Edk2Path.GetContainingModules()
  - path_utilities: Add an env variable to allow nested packages

  Release Notes:
    - https://github.com/tianocore/edk2-pytool-library/releases/tag/v0.12.0
    - https://github.com/tianocore/edk2-pytool-library/releases/tag/v0.12.1

- edk2-pytool-extensions 0.19.1 to 0.20.0 major changes:
  - .vscode/settings.json: Enable flake8 linting
  - Add Pydocstyle
  - Move dependabot.yml locatio
  - Fix typos in robot files
  - Pydocstyle Updates
  - Plugin Loader Updates
  - edk2_stuart_pr_eval: Improve robustness of path comparisons
  - edk2_pr_eval.py: Build all packages on file change outside package
  - Allow build wrappers

  Release Notes:
    - https://github.com/tianocore/edk2-pytool-extensions/releases/tag/v0.20.0

- [ ] Breaking change?
  - Will this change break pre-existing builds or functionality without action being taken?
  **No**

## How This Was Tested

Verified stuart setup, update, and build commands.

## How This Was Documented

N/A - Impacts local repo pip dependencies

## Integration Instructions

N/A - Impacts local repo pip dependencies

Signed-off-by: dependabot[bot] <support@github.com>
Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com>

pip-requirements.txt

@@ -12,8 +12,8 @@
 # https://www.python.org/dev/peps/pep-0440/#version-specifiers
 ##
 
-edk2-pytool-library~=0.11.6 # MU_CHANGE
-edk2-pytool-extensions~=0.19.1 # MU_CHANGE
+edk2-pytool-library~=0.12.1 # MU_CHANGE
+edk2-pytool-extensions~=0.20.0 # MU_CHANGE
 edk2-basetools==0.1.29 # MU_CHANGE - update to 0.1.13 or later
 antlr4-python3-runtime==4.11.1
 regex==2022.10.31