Drop building the package on Py2 in CI.

Author: Julian

.github/workflows/packaging.yml

@@ -11,7 +11,7 @@ jobs:
     strategy:
       matrix:
         os: [macos-latest, ubuntu-latest]
-        python-version: [pypy2, pypy3, 3.7, 3.8]
+        python-version: [pypy3, 3.7, 3.8]
 
     steps:
     - uses: actions/checkout@v2