Fixed some low hanging fruit in performance.

src/Parser/Lexer/Lexer.hpp

@@ -38,7 +38,7 @@ namespace MalachScript::Parser {
             if (pos >= _scriptLength) {
                 return '\0';
             }
-            return *(_script.data() + pos);
+            return _script[pos];
         }
 
         LexToken* LexNext();