not py3.8 support

Author: Nicholas Youngblut

.github/workflows/pythonpackage.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.6, 3.7, 3.8]
+        python-version: [3.6, 3.7]
     steps:
     - uses: goanpeca/setup-miniconda@v1
       with: