Add date and time scalars

Date, DateTime, DateTimeWithoutTimezone, TimeWithoutTimezone

Author: dphm

shopify_function/src/scalars.rs

@@ -8,3 +8,8 @@ pub use decimal::Decimal;
 pub type Void = ();
 pub type URL = String;
 pub type Handle = String;
+
+pub type Date = String;
+pub type DateTime = String;
+pub type DateTimeWithoutTimezone = String;
+pub type TimeWithoutTimezone = String;