Added Python 3.10 to unit test roster

Author: fnesveda

.github/workflows/lint_and_test.yaml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        python-version: [3.7, 3.8, 3.9]
+        python-version: ["3.7", "3.8", "3.9", "3.10"]
 
     steps:
     - name: Checkout repository

.github/workflows/release.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        python-version: [3.7, 3.8, 3.9]
+        python-version: ["3.7", "3.8", "3.9", "3.10"]
 
     steps:
     - name: Checkout repository

CHANGELOG.md

@@ -8,6 +8,7 @@ Changelog
 
 - updated dependencies
 - fixed some lint issues in shell scripts and `setup.py`
+- added Python 3.10 to unit test roster
 
 [0.5.0](../../releases/tag/v0.5.0) - 2021-09-16
 -----------------------------------------------