MNT: General clean-up from astropy#271

because that PR might take a while and these should be uncontroversial

.github/workflows/ci_workflows.yml

@@ -38,9 +38,7 @@ jobs:
       if: startsWith(matrix.os, 'ubuntu')
       run: |
         sudo apt-get update
-        sudo apt-get install libgeos-dev
-        sudo apt-get install libfreetype-dev
-        sudo apt-get install libpng-dev
+        sudo apt-get -y install libgeos-dev libfreetype-dev libpng-dev
     - name: Install tox
       run: python -m pip install tox
     - name: Install codecov

README.rst

@@ -1,4 +1,4 @@
-|Docs| |Build Status| |CI Status| |Coverage Status| |Powered by Astropy Badge|
+|Docs| |PyPI| |Build Status| |CI Status| |Coverage Status| |Powered by Astropy Badge|
 
 About
 =====
@@ -24,6 +24,8 @@ https://reproject.readthedocs.io
 
 .. |Docs| image:: https://readthedocs.org/projects/reproject/badge/?version=latest
    :target: https://reproject.readthedocs.io/en/latest/?badge=latest
+.. |PyPI| image:: https://img.shields.io/pypi/v/reproject.svg
+   :target: https://pypi.python.org/pypi/reproject
 .. |Build Status| image:: https://dev.azure.com/astropy-project/reproject/_apis/build/status/astropy.reproject?branchName=main
    :target: https://dev.azure.com/astropy-project/reproject/_build/latest?definitionId=3&branchName=main
 .. |CI Status| image:: https://github.com/astropy/reproject/workflows/CI/badge.svg

setup.cfg

@@ -25,9 +25,6 @@ install_requires =
 [options.extras_require]
 test =
     pytest-astropy
-    pytest-arraydiff
-    pytest-cov
-    pytest-doctestplus
 testall =
     shapely;sys_platform!='win32' and python_version!='3.8'
     sunpy[map]>=2.1;platform_machine!='i686'
@@ -36,7 +33,6 @@ testall =
     pyvo
 docs =
     sphinx-astropy
-    pytest
     pyvo
     matplotlib