Add 3.10 to gihub PR tests

Author: Val Brodsky

.github/workflows/python-package.yml

@@ -26,6 +26,10 @@ jobs:
             prod-key: PROD_LABELBOX_API_KEY_3
             staging-key: STAGING_LABELBOX_API_KEY_3
             da-test-key: DA_GCP_LABELBOX_API_KEY
+          - python-version: '3.10'
+            prod-key: PROD_LABELBOX_API_KEY_4
+            staging-key: STAGING_LABELBOX_API_KEY_4
+            da-test-key: DA_GCP_LABELBOX_API_KEY
 
     steps:
       - name: Cancel previous workflow

tox.ini

@@ -1,6 +1,6 @@
 # content of: tox.ini , put in same dir as setup.py
 [tox]
-envlist = py37, py38, py39
+envlist = py37, py38, py39, py310
 
 [testenv]
 # install pytest in the virtualenv where commands will be executed