Support Python 3.9 (#61)

* Add support for Python 3.9

* Bump the version.

* Fix test command for windows.

.github/workflows/tests.yaml

@@ -12,7 +12,7 @@ jobs:
 
     strategy:
       matrix:
-        python-version: [3.5, 3.6, 3.7, 3.8]
+        python-version: [3.5, 3.6, 3.7, 3.8, 3.9]
         os: [ubuntu-latest, macos-latest, windows-latest]
 
     steps:
@@ -42,7 +42,7 @@ jobs:
 
     - name: PyTest
       run: |
-        pytest --cov deepcell_tracking --pep8
+        python -m pytest --cov deepcell_tracking --pep8
 
     - name: Coveralls
       if: env.COVERALLS_REPO_TOKEN != null

setup.py

@@ -37,7 +37,7 @@
     readme = f.read()
 
 
-VERSION = '0.4.1'
+VERSION = '0.4.2'
 NAME = 'DeepCell_Tracking'
 DESCRIPTION = 'Tracking cells and lineage with deep learning.'
 LICENSE = 'LICENSE'
@@ -77,4 +77,5 @@
           'Programming Language :: Python :: 3.5',
           'Programming Language :: Python :: 3.6',
           'Programming Language :: Python :: 3.7',
-          'Programming Language :: Python :: 3.8'])
+          'Programming Language :: Python :: 3.8',
+          'Programming Language :: Python :: 3.9'])