feat: add py39 to ci tests

.github/workflows/ci.yml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       max-parallel: 4
       matrix:
-        python-version: [3.6, 3.7, 3.8]
+        python-version: [3.6, 3.7, 3.8, 3.9]
 
     steps:
     - uses: actions/checkout@v2
@@ -76,7 +76,7 @@ jobs:
 
       - name: Install dependencies
         run: |
-          python -m pip install --upgrade pip poetry
+          curl -sSL https://raw.githubusercontent.com/python-poetry/poetry/master/get-poetry.py | python -
           poetry install --no-dev
 
       - name: Publish

README.md

@@ -3,7 +3,7 @@
 A wrapper around argparser to help build CLIs from functions. Uses type-hints extensively :snake:.
 
 [![PyPi Version](https://img.shields.io/pypi/v/arger.svg?style=flat)](https://pypi.python.org/pypi/arger)
-[![Python Version](https://img.shields.io/pypi/pyversions/returns.svg)](https://pypi.org/project/arger/)
+[![Python Version](https://img.shields.io/pypi/pyversions/arger.svg)](https://pypi.org/project/arger/)
 ![](https://github.com/jnoortheen/arger/workflows/test-and-publish/badge.svg)
 [![PyPI License](https://img.shields.io/pypi/l/arger.svg)](https://pypi.org/project/arger)
 

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py36,py37,py38
+envlist = py36,py37,py38,py39
 skipsdist = True
 toxworkdir = .cache/.tox
 
@@ -8,6 +8,7 @@ python =
     3.6: py36
     3.7: py37
     3.8: py38
+    3.9: py39
 
 [testenv]
 whitelist_externals =