chore(#2787): minimum nvim version 0.9, replace 0.10 deprecated, enable deprecated warnings (#2788)

* refactor(#2787): replace deprecated

* refactor(#2787): enable deprecated checks

* refactor(#2787): replace deprecated

* refactor(#2787): replace deprecated

* refactor(#2787): replace deprecated

* refactor(#2787): replace deprecated

* refactor(#2787): use inline deprecation disabling

* refactor(#2787): replace deprecated

* refactor(#2787): replace deprecated

* refactor(#2787): replace deprecated

* refactor(#2787): replace deprecated

* refactor(#2787): replace deprecated

* refactor(#2787): replace deprecated

* refactor(#2787): replace deprecated

* refactor(#2787): replace deprecated

* refactor(#2787): replace deprecated

* refactor(#2787): deprecated are now warnings

* refactor(#2787): 0.9 is the minimum supported version

* Revert "refactor(#2787): replace deprecated"

This reverts commit b6b4c32fcb.

* refactor(#2787): suppress deprecated until 0.11

* refactor(#2787): minimum nvim version 0.8 -> 0.9

* refactor(#2787): reset globals

* refactor(#2787): explicitly check for vim.diagnostic.is_enabled function presence

doc/nvim-tree-lua.txt

@@ -103,7 +103,7 @@ Git Integration
 
 Requirements
 
-    This file explorer requires `neovim >= 0.8.0`
+    This file explorer requires `neovim >= 0.9.0`
 
 ==============================================================================
  2. QUICKSTART                                          *nvim-tree-quickstart*
@@ -832,7 +832,6 @@ Use nvim-tree in a floating window.
 
 Highlight precedence, additive:
   git < opened < modified < bookmarked < diagnostics < copied < cut
-Neovim <= 0.8 will only show the highest.
 
 *nvim-tree.renderer.add_trailing*
 Appends a trailing slash to folder names.