Refactor function signatures to use slices

src/ast/rtl/series.rs

@@ -503,7 +503,7 @@ pub fn register(env: &Environment) {
             ret: StaticType::Any,                             // In reality: Object(RecordSeries)
         })),
         Purity::Impure,
-        |args: std::vec::Vec<Value>| {
+        |args: &[Value]| {
             if args.len() != 1 {
                 panic!("create-series expects exactly 1 argument (a record)");
             }
@@ -525,7 +525,7 @@ pub fn register(env: &Environment) {
             ret: StaticType::Void,
         })),
         Purity::Impure,
-        |args: std::vec::Vec<Value>| {
+        |args: &[Value]| {
             if args.len() != 2 {
                 panic!("push-series expects exactly 2 arguments (series, record)");
             }