feat: Add support for Python 3.8, Python 3.9, pypy-3.7 and pypy-3.8. (#…

…689)

Closes: SDK-1988

.github/workflows/build.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [ '3.6', '3.7', 'pypy-3.6-v7.3.3' ]
+        python-version: ['3.6', 'pypy-3.6-v7.3.3', '3.7', 'pypy-3.7', '3.8', 'pypy-3.8', '3.9']
     name: Build with Python ${{ matrix.python-version }}
     steps:
       - name: Checkout

boxsdk/util/enum.py

@@ -82,8 +82,11 @@ def __members__(cls):
         return members
 
     def __contains__(cls, member):
-        if super(ExtendableEnumMeta, cls).__contains__(member):
-            return True
+        try:
+            if super(ExtendableEnumMeta, cls).__contains__(member):
+                return True
+        except TypeError:
+            return False
 
         def in_(subclass):
             return member in subclass

tox.ini

@@ -8,17 +8,25 @@ envlist =
   pycodestyle,
   pylint,
   py36,
+  pypy36,
   py37,
-  pypy,
+  pypy37,
+  py38,
+  pypy38,
+  py39,
   rst,
   docs,
   coverage
 
 [gh-actions]
 python =
     3.6: py36, pycodestyle, pylint, rst, docs
+    pypy-3.6: pypy36
     3.7: py37
-    pypy-3.6: pypy
+    pypy-3.7: pypy37
+    3.8: py38
+    pypy-3.8: pypy38
+    3.9: py39
 
 [testenv]
 commands =