Added support for Python version 3.9. (#1005)

Author: dieppedalle

.github/workflows/build_and_deploy.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.6', '3.7']
+        python-version: ['3.6', '3.7', '3.9']
 
     steps:
     - uses: actions/checkout@v3

setup.py

@@ -218,9 +218,8 @@ def run_tests(self):
     tests_require=[
         'absl-py>=0.10.0',
         'mock>=2.0.0',
-        # Remove max version here after we drop Python 2 support.
-        'pandas>=0.22.0,<0.25.0',
-        'numpy<1.17.0',
+        'pandas>=0.22.0',
+        'numpy',
         'pytest>=2.9.2',
         'pytest-cov>=2.2.1',
     ],

tox.ini

@@ -1,10 +1,11 @@
 [tox]
-envlist = py36,py37
+envlist = py36,py37,py39
 
 [gh-actions]
 python =
     3.6: py36
     3.7: py37
+    3.9: py39
 
 [testenv]
 deps = -r{toxinidir}/test_reqs.txt