feat(colors): Coqtail support

This commit adds support for whonore/Coqtail.

README.md

@@ -135,6 +135,7 @@ You can either use [`nvim-treesitter`](https://github.com/nvim-treesitter/nvim-t
 |:-----------|:------------------------------------------------------------------------------------------|
 | ALGOL      | [sterpe/vim-algol68](https://github.com/sterpe/vim-algol68)                               |
 | C++        | [bfrg/vim-cpp-modern](https://github.com/bfrg/vim-cpp-modern)                             |
+| Coq        | [whonore/Coqtail](https://github.com/whonore/Coqtail)                                     |
 | Dart       | [dart-lang/dart-vim-plugin](https://github.com/dart-lang/dart-vim-plugin)                 |
 | DTrace     | [vim-scripts/dtrace-syntax-file](https://github.com/vim-scripts/dtrace-syntax-file)       |
 | F#         | [ionide/Ionide-vim](https://github.com/ionide/Ionide-vim)                                 |

colors/highlite.vim

@@ -671,6 +671,21 @@ local highlight_groups = {
 	texMathRegionX  = 'Number',
 	texMathRegionXX = 'Number',
 
+	--[[ 4.3.36. Coq ]]
+	coqConstructor   = 'Constant',
+	coqDefBinderType = 'coqDefType',
+	coqDefContents1  = 'coqConstructor',
+	coqDefType  = 'Typedef',
+	coqIndBinderTerm  = 'coqDefBinderType',
+	coqIndConstructor = 'Delimiter',
+	coqIndTerm = 'Type',
+	coqKwd = 'Keyword',
+	coqKwdParen = 'Function',
+	coqRequire  = 'Include',
+	coqTermPunctuation = 'Delimiter',
+	coqVernacCmd = 'Statement',
+	coqVernacPunctuation = 'Delimiter',
+
 	--[[ 4.4. Plugins
 		Everything in this section is OPTIONAL. Feel free to remove everything
 		here if you don't want to define it, or add more if there's something