temporarily install matplolib and ipywidgets in pylit workflow

Author: slayoo

.github/workflows/pylint.yml

@@ -21,6 +21,7 @@ jobs:
     - run: |
         python -m pip install --upgrade pip
         pip install pylint pytest nbqa nbconvert
+        pip install pylint pytest matplotlib ipywidgets # TEMPORARY! TODO #75
         pip install -e .
     - run: pylint --unsafe-load-any-extension=y --disable=fixme,no-member,trailing-newlines,missing-module-docstring,missing-class-docstring,missing-function-docstring,unnecessary-pass $(git ls-files '*.py')
     - run: nbqa pylint --unsafe-load-any-extension=y --disable=fixme,no-member,wrong-import-position,trailing-whitespace,missing-function-docstring,missing-module-docstring $(git ls-files '*.ipynb')

examples/widgets_playground.ipynb

@@ -18,7 +18,7 @@
    "outputs": [],
    "source": [
     "import subprocess\n",
-    "for package in ('ipywidgets', 'matplotlib'):\n",
+    "for package in ('ipywidgets', 'matplotlib', 'ipympl'):\n",
     "    subprocess.check_call([sys.executable, \"-m\", \"pip\", \"install\", \"--quiet\", package])"
    ]
   },