Added support for .tex files (#159)

* Added support for .tex files

* Added spacing for consistency with rest of theme. Removed bold for consistency with rest of theme. Both for TeX coloring only.

colors/onedark.vim

@@ -493,6 +493,20 @@ call s:h("scssMixin", { "fg": s:purple })
 call s:h("scssSelectorName", { "fg": s:dark_yellow })
 call s:h("scssVariable", { "fg": s:purple })
 
+" TeX
+call s:h("texStatement", { "fg": s:purple })
+call s:h("texSubscripts", { "fg": s:dark_yellow })
+call s:h("texSuperscripts", { "fg": s:dark_yellow })
+call s:h("texTodo", { "fg": s:dark_red })
+call s:h("texBeginEnd", { "fg": s:purple })
+call s:h("texBeginEndName", { "fg": s:blue })
+call s:h("texMathMatcher", { "fg": s:blue })
+call s:h("texMathDelim", { "fg": s:blue })
+call s:h("texDelimiter", { "fg": s:dark_yellow })
+call s:h("texSpecialChar", { "fg": s:dark_yellow })
+call s:h("texCite", { "fg": s:blue })
+call s:h("texRefZone", { "fg": s:blue })
+"
 " TypeScript
 call s:h("typescriptReserved", { "fg": s:purple })
 call s:h("typescriptEndColons", { "fg": s:white })