explicit lxml build deps

Author: rmorshea

.github/workflows/.hatch-run.yml

@@ -42,7 +42,7 @@ jobs:
         if: matrix.runs-on == 'ubuntu-latest'
         run: |
             sudo apt-get update
-            sudo apt-get install -y python3-lxml
+            sudo apt-get install -y libxml2-dev libxslt-dev
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v2
         with: