Update Readme and docs with latest supported Qt versions (#580)

Co-authored-by: Carlos Cordoba <[email protected]>

README.md

@@ -18,9 +18,7 @@ and more.
 ![qtconsole](https://raw.githubusercontent.com/jupyter/qtconsole/master/docs/source/_images/qtconsole.png)
 
 ## Install Qtconsole
-The Qtconsole requires Python bindings for Qt, such as [PyQt5](http://www.riverbankcomputing.com/software/pyqt/intro),
-[PyQt4](https://www.riverbankcomputing.com/software/pyqt/download),
-or [PySide](http://pyside.github.io/docs/pyside).
+The Qtconsole requires Python bindings for Qt, such as [PyQt6](https://pypi.org/project/PyQt6/), [PySide6](https://pypi.org/project/PySide6/), [PyQt5](https://pypi.org/project/PyQt5/) or [PySide2](https://pypi.org/project/PySide2/).
 
 Although [pip](https://pypi.python.org/pypi/pip) and
 [conda](http://conda.pydata.org/docs) may be used to install the Qtconsole, conda

docs/source/installation.rst

@@ -1,15 +1,14 @@
 Installation
 ============
 The Qt console requires Qt, such as
-`PyQt5 <https://www.riverbankcomputing.com/software/pyqt/intro>`_,
-`PyQt4 <https://www.riverbankcomputing.com/software/pyqt/download>`_, or
-`PySide <http://pyside.github.io/docs/pyside>`_.
+`PyQt6 <https://pypi.org/project/PyQt6>`_,
+`PySide6 <https://pypi.org/project/PySide6>`_,
+`PyQt5 <https://pypi.org/project/PyQt5>`_,
+`PySide2 <https://pypi.org/project/PySide2>`_.
 
 Although `pip <https://pypi.python.org/pypi/pip>`_ and
 `conda <http://conda.pydata.org/docs>`_ may be used to install the Qt console,
-conda is simpler to use since it automatically installs PyQt. Alternatively,
-qtconsole installation with pip needs additional steps since pip cannot install
-the Qt requirement.
+conda is simpler to use since it automatically installs PyQt.
 
 Install using conda
 -------------------
@@ -28,27 +27,21 @@ To install::
 
     pip install qtconsole
 
-.. important::
-
-    Make sure that Qt is installed. Unfortunately, Qt cannot be
-    installed using pip. The next section gives instructions on installing Qt.
-
 Installing Qt (if needed)
 -------------------------
 We recommend installing PyQt with `conda <http://conda.pydata.org/docs>`_::
 
     conda install pyqt
 
-or with a system package manager. For Windows, PyQt binary packages may be
-used.
+or with pip::
+
+    pip install PyQt5
 
 For example with Linux Debian's system package manager, use::
 
    sudo apt-get install python3-pyqt5 # PyQt5 on Python 3
-   sudo apt-get install python3-pyqt4 # PyQt4 on Python 3
-   sudo apt-get install python-qt4    # PyQt4 on Python 2
 
-.. seealso::
+See also::
 
    `Installing Jupyter <https://jupyter.readthedocs.io/en/latest/install.html>`_
    The Qt console is part of the Jupyter ecosystem.