Test on develop branch and on python 3.10

Author: tboggs

.github/workflows/python-package.yml

@@ -5,9 +5,9 @@ name: Unit Tests
 
 on:
   push:
-    branches: [ master ]
+    branches: [ master, develop ]
   pull_request:
-    branches: [ master ]
+    branches: [ master, develop ]
 
 jobs:
   build:
@@ -16,7 +16,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [2.7, 3.6, 3.7, 3.8, 3.9]
+        python-version: [2.7, 3.6, 3.7, 3.8, 3.9, 3.10]
 
     steps:
     - uses: actions/checkout@v2