Use no-std-compat to build no-std.

src/packages/fn_basic.rs

@@ -1,5 +1,7 @@
 use crate::plugin::*;
 use crate::{def_package, FnPtr, ImmutableString, NativeCallContext};
+#[cfg(feature = "no_std")]
+use std::prelude::v1::*;
 
 def_package!(crate:BasicFnPackage:"Basic Fn functions.", lib, {
     combine_with_exported_module!(lib, "FnPtr", fn_ptr_functions);
@@ -34,7 +36,8 @@ mod fn_ptr_functions {
 #[cfg(not(feature = "no_index"))]
 #[cfg(not(feature = "no_object"))]
 fn collect_fn_metadata(ctx: NativeCallContext) -> crate::Array {
-    use crate::{ast::ScriptFnDef, stdlib::collections::BTreeSet, Array, Identifier, Map};
+    use crate::{ast::ScriptFnDef, Array, Identifier, Map};
+    use std::collections::BTreeSet;
 
     // Create a metadata record for a function.
     fn make_metadata(