use ubuntu's python

.github/workflows/build.yml

@@ -12,10 +12,6 @@ jobs:
       - uses: actions/checkout@v1
         with:
           submodules: recursive
-      - uses: actions/setup-python@v1
-        with:
-          python-version: '2.7.x'
-          architecture: 'x64'
       - name: download dependencies
         shell: bash
         run: |
@@ -23,6 +19,12 @@ jobs:
       - name: install dependencies
         shell: bash
         run: |
+          # I'd love to use a setup-python action but it seems to give a
+          # python that doesn't support unicode.  See:
+          #   https://github.com/actions/setup-python/issues/23
+
+          sudo apt-get install python2.7
+
           sudo apt-get install gettext
 
           # for shapely