fix: user lua conf reloading fails

The cache should be invalidated. This fix does not work 100%, because, e.g.,
there are other configs hiding deeper under lua/config/ directory.
A restart is the best way to reload the config.

docs/README.md

@@ -65,7 +65,7 @@ pip install -U pynvim
 [python-lsp-server (pylsp)](https://github.com/python-lsp/python-lsp-server) is a Python [Language Server](https://microsoft.github.io/language-server-protocol/) for completion, linting, go to definition, etc.
 
 ```
-pip install 'python-lsp-server[all]' pylsp-mypy pyls-isort
+pip install 'python-lsp-server[all]' pylsp-mypy python-lsp-isort python-lsp-black
 ```
 
 Note the executable for pylsp is also named `pylsp`. You need to set its PATH correctly.

docs/nvim_setup_linux.sh

@@ -68,7 +68,7 @@ fi
 
 # Install some Python packages used by Nvim plugins.
 echo "Installing Python packages"
-declare -a PY_PACKAGES=("pynvim" 'python-lsp-server[all]' "black" "vim-vint" "pyls-isort" "pylsp-mypy")
+declare -a PY_PACKAGES=("pynvim" 'python-lsp-server[all]' "vim-vint" "python-lsp-isort" "pylsp-mypy" "python-lsp-black")
 
 if [[ "$SYSTEM_PYTHON" = true ]]; then
     echo "Using system Python to install $(PY_PACKAGES)"

docs/nvim_setup_windows.ps1

@@ -27,7 +27,7 @@ scoop install miniconda3
 pip install -U pynvim
 
 # Install python-language-server
-pip install 'python-lsp-server[all]' pylsp-mypy pyls-isort
+pip install 'python-lsp-server[all]' pylsp-mypy python-lsp-isort
 
 # Install visual c++ redistribution
 scoop install vcredist2022

init.lua

@@ -43,6 +43,7 @@ for _, file_name in ipairs(core_conf_files) do
     vim.cmd(source_cmd)
   else
     local module_name, _ = string.gsub(file_name, "%.lua", "")
+    package.loaded[module_name] = nil
     require(module_name)
   end
 end