Support argcomplete 2.0.0 (#790)

Author: hswong3i

docs/changelog.md

@@ -1,5 +1,6 @@
 dev
 
+- Support [argcomplete 2.0.0](https://pypi.org/project/argcomplete/2.0.0) (#790)
 - Include machinery to build a manpage for pipx with [argparse-manpage](https://pypi.org/project/argparse-manpage/).
 - Add better handling for 'app not found' when a single app is present in the project, and an improved error message (#733)
 - Fixed animations sending output to stdout, which can break JSON output. (#769)

setup.cfg

@@ -33,7 +33,7 @@ python_requires = >=3.6
 install_requires =
     colorama>=0.4.4;sys_platform=="win32"
     userpath>=1.6.0
-    argcomplete>=1.9.4, <2.0
+    argcomplete>=1.9.4
     packaging>=20.0
     importlib-metadata>=3.3.0; python_version < '3.8'