Register property versions of some methods.

tests/arrays.rs

@@ -26,7 +26,7 @@ fn test_arrays() -> Result<(), Box<EvalAltResult>> {
                 let y = [4, 5];
                 x.append(y);
 
-                x.len() + r
+                x.len + r
            "
         )?,
         14

tests/for.rs

@@ -48,7 +48,7 @@ fn test_for_object() -> Result<(), Box<EvalAltResult>> {
             sum += value;
         }
 
-        keys.len() + sum
+        keys.len + sum
     "#;
 
     assert_eq!(engine.eval::<INT>(script)?, 9);

tests/time.rs

@@ -1,4 +1,3 @@
-#![cfg(not(feature = "no_stdlib"))]
 #![cfg(not(feature = "no_std"))]
 
 use rhai::{Engine, EvalAltResult, INT};