patch 9.0.2097: No support for cypher files

Problem:  No support for cypher files
Solution: Add cypher filetype detection

Cypher query language support to work with (mostly) graph databases.

Already existing lsp support in Neovim's nvim-lspconfig:
https://github.com/neovim/nvim-lspconfig/blob/master/doc/server_configurations.md#cypher_ls

closes: #13516

Signed-off-by: Gerrit Meier <meistermeier@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

runtime/filetype.vim

@@ -342,6 +342,9 @@ au BufNewFile,BufRead *.cc
 au BufNewFile,BufRead *.cpp
 	\ if exists("cynlib_syntax_for_cpp")|setf cynlib|else|setf cpp|endif
 
+" Cypher query language
+au BufNewFile,BufRead *.cypher			setf cypher
+
 " C++
 au BufNewFile,BufRead *.cxx,*.c++,*.hh,*.hxx,*.hpp,*.ipp,*.moc,*.tcc,*.inl setf cpp
 if has("fname_case")

src/testdir/test_filetype.vim

@@ -186,6 +186,7 @@ def s:GetFilenameChecks(): dict<list<string>>
     cvs: ['cvs123'],
     cvsrc: ['.cvsrc'],
     cynpp: ['file.cyn'],
+    cypher: ['file.cypher'],
     d: ['file.d'],
     dart: ['file.dart', 'file.drt'],
     datascript: ['file.ds'],

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2097,
 /**/
     2096,
 /**/