Add python 3.9 to CI & list as supported

Author: mfussenegger

.github/workflows/main.yml

@@ -22,7 +22,7 @@ jobs:
         crate-version: [nightly]
         os: [ubuntu-latest]
         sqla-version: ['1.1.15', '1.2.18', '1.3.17']
-        python-version: [3.5, 3.6, 3.7, 3.8]
+        python-version: [3.5, 3.6, 3.7, 3.8, 3.9]
 
     steps:
       - uses: actions/checkout@master

CHANGES.txt

@@ -5,6 +5,8 @@ Changes for crate
 Unreleased
 ==========
 
+- Added official Python 3.9 support.
+
 2020/09/28 0.26.0
 =================
 

setup.py

@@ -83,6 +83,7 @@ def read(path):
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
+        'Programming Language :: Python :: 3.9',
         'Programming Language :: Python :: Implementation :: CPython',
         'Programming Language :: Python :: Implementation :: PyPy',
         'Topic :: Database'