Fix syntax highlighting unicode support (#475)

* convert BasicParser to a template

* fix syntax hightlighting with unicode characters

src/coders/lua_parsing.hpp

@@ -6,9 +6,7 @@
 #include "devtools/syntax.hpp"
 
 namespace lua {
-    bool is_lua_keyword(std::string_view view);
-
     std::vector<devtools::Token> tokenize(
-        std::string_view file, std::string_view source
+        std::string_view file, std::wstring_view source
     );
 }