Drop PySide2 from support

.github/workflows/ci.yml

@@ -14,16 +14,12 @@ jobs:
       matrix:
         os: [macos-latest, ubuntu-latest, windows-latest]
         python-version: ['3.7', '2.7']
-        PYTEST_QT_API: [pyqt5, pyqt4v2, pyside2]
+        PYTEST_QT_API: [pyqt5, pyqt4v2]
         exclude:
           - os: macos-latest
             PYTEST_QT_API: pyqt4v2
-          - os: macos-latest
-            PYTEST_QT_API: pyside2
           - os: windows-latest
             PYTEST_QT_API: pyqt4v2
-          - os: windows-latest
-            PYTEST_QT_API: pyside2
           - python-version: '3.7'
             PYTEST_QT_API: pyqt4v2
 

README.md

@@ -57,7 +57,7 @@ It is written in Python and uses Qt for its graphical interface.
 
 - Ubuntu / macOS / Windows
 - Python2 / Python3
-- [PyQt4 / PyQt5](http://www.riverbankcomputing.co.uk/software/pyqt/intro) / [PySide2](https://wiki.qt.io/PySide2_GettingStarted)
+- [PyQt4 / PyQt5](http://www.riverbankcomputing.co.uk/software/pyqt/intro)
 
 
 ## Installation