Revert "Clarify pynvim's dependency on typing-extensions"

The issue with pynvim 0.5.1 not pulling in all its dependencies has
been fixed upstream: neovim/pynvim#581

.github/ISSUE_TEMPLATE/new-issue.md

@@ -12,7 +12,6 @@ assignees: ''
 - [ ] Plugin version (`vim -V1 -i NONE -ENsu ~/.vimrc -c ":echo g:cpywrite#version \"\n\"" +q`):
 
 *If applicable, include  one of the following:*
-- [ ] Output of `pip list | grep requests`:
 - [ ] Output of `pip list | grep pynvim` :
 - [ ] Output of `gvim --version`:
 - [ ] Output of `vim --version`:

README.rst

@@ -156,11 +156,10 @@ Requirements
   See if you're supported by entering ``vim --version | grep +python3`` at your
   terminal, or start ``vim`` and enter the ``:version`` command
 
-* Neovim with the `pynvim`_ and `typing-extensions`_ modules in your ``$PYTHONPATH``. Start ``nvim``
+* Neovim with the `pynvim`_ module in your ``$PYTHONPATH``. Start ``nvim``
   and enter ``:help provider-python`` for more information
 
 .. _pynvim: https://github.com/neovim/pynvim
-.. _typing-extensions: https://pypi.org/project/typing-extensions
 
 Installation
 ============

test/requirements.txt

@@ -1,5 +1,5 @@
 pynvim < 0.5 ; python_version < '3.7'
-pynvim==0.5.1 ; python_version >= '3.7'
+pynvim==0.5.2 ; python_version >= '3.7'
 pytest==8.3.3 ; python_version >= '3.12'
-coverage==7.6.4 ; python_version >= '3.12'
-typing-extensions
+coverage==7.6.8 ; python_version >= '3.12'
+typing-extensions ; python_version < '3.8'