Merge pull request #116 from learningequality/npm_publish

Install pre-commit to ensure that the npm publish can happen unimpeded.

.github/workflows/npm-publish.yml

@@ -17,6 +17,11 @@ jobs:
         uses: actions/setup-python@v4
         with:
           python-version: 3.9
+      - name: Cache pip
+        uses: actions/cache@v2
+        with:
+          path: ~/.cache/pip
+          key: ${{ runner.os }}-pip-py3.9-${{ hashFiles('.github/workflows/npm-publish.yml') }}
       - name: Install Python dependencies
         run: |
             python -m pip install --upgrade pip