change in syntax for types declaration

Can we have new syntax for function type hinting
Current;

 fn function_name(var : String) -> String:
       # function body

 fn function_name(var : String) -> String:
       # function body

 fn function_name(var : String) -> String:
       # function body

 fn function_name(var : String) -> String:
       # function body

New declaration:

 fn function_name(var : string) -> string:
       # function body

 fn function_name(var : string) -> string:
       # function body

 fn function_name(var : string) -> string:
       # function body

 fn function_name(var : string) -> string:
       # function body

I am asking for removal for capitalization of type name