Pin click<8.1.0 to retain Python 3.6 compatibility

Author: deepyaman

CHANGELOG.md

@@ -7,7 +7,7 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 ### Fixed
 
 - [#1963](https://github.com/plotly/dash/pull/1963) Fix [#1780](https://github.com/plotly/dash/issues/1780) flask shutdown deprecation warning when running dashduo threaded tests.
-- [#1993](https://github.com/plotly/dash/pull/1993) Pin Flask<2.1.0 and Werkzeug<2.1.0 to retain Python 3.6 compatibility, resolving [#1992](https://github.com/plotly/dash/issues/1992).
+- [#1993](https://github.com/plotly/dash/pull/1993) Pin Flask<2.1.0, Werkzeug<2.1.0, and click<8.1.0 to retain Python 3.6 compatibility, resolving [#1992](https://github.com/plotly/dash/issues/1992).
 
 ## [2.3.0] - 2022-03-13
 

requires-all.txt

@@ -32,6 +32,7 @@ multiprocess>=0.70.12
 psutil>=5.8.0
 Flask>=1.0.4,<2.1.0  # Flask 2.1.0 dropped support for Python 3.6
 Werkzeug<2.1.0  # Werkzeug 2.1.0 dropped support for Python 3.6
+click<8.1.0  # click 8.1.0 dropped support for Python 3.6
 flask-compress
 plotly>=5.0.0
 dash_html_components==2.0.0

requires-install.txt

@@ -1,5 +1,6 @@
 Flask>=1.0.4,<2.1.0  # Flask 2.1.0 dropped support for Python 3.6
 Werkzeug<2.1.0  # Werkzeug 2.1.0 dropped support for Python 3.6
+click<8.1.0  # click 8.1.0 dropped support for Python 3.6
 flask-compress
 plotly>=5.0.0
 dash_html_components==2.0.0