Fix no-std build.

src/packages/time_basic.rs

@@ -1,3 +1,5 @@
+#![cfg(not(feature = "no_std"))]
+
 use super::arithmetic::make_err as make_arithmetic_err;
 use crate::plugin::*;
 use crate::{def_package, Dynamic, EvalAltResult, RhaiResult, RhaiResultOf, INT};