added Pygments dep per build log

2021-08-09T07:53:16.6859110Z + /usr/local/Cellar/python/3.7.8/bin/pip3 install --ignore-installed --upgrade --cache-dir build/deps/ --no-index --find-links file:///Users/runner/work/cross-platform-python-gui/cross-platform-python-gui/build/deps/ build/deps/Kivy-1.11.1-cp37-cp37m-macosx_10_6_intel.macosx_10_9_intel.macosx_10_9_x86_64.macosx_10_10_intel.macosx_10_10_x86_64.whl
2021-08-09T07:53:17.1617790Z Looking in links: file:///Users/runner/work/cross-platform-python-gui/cross-platform-python-gui/build/deps/
2021-08-09T07:53:17.1643240Z Processing ./build/deps/Kivy-1.11.1-cp37-cp37m-macosx_10_6_intel.macosx_10_9_intel.macosx_10_9_x86_64.macosx_10_10_intel.macosx_10_10_x86_64.whl
2021-08-09T07:53:17.5610490Z Processing ./build/deps/kivy-garden-0.1.4.tar.gz
2021-08-09T07:53:17.9619310Z Processing ./build/deps/docutils-0.16-py2.py3-none-any.whl
2021-08-09T07:53:18.0680620Z ERROR: Could not find a version that satisfies the requirement pygments (from Kivy==1.11.1) (from versions: none)
2021-08-09T07:53:18.1515180Z ERROR: No matching distribution found for pygments (from Kivy==1.11.1)