feat: add Reflect.deleteProperty

tests/all/js_globals/Reflect.rs

@@ -203,4 +203,52 @@ fn define_property() {
         "#,
         )
         .test()
+}
+
+#[test]
+fn delete_property() {
+    project()
+        .file(
+            "src/lib.rs",
+            r#"
+            #![feature(proc_macro, wasm_custom_section)]
+
+            extern crate wasm_bindgen;
+            use wasm_bindgen::prelude::*;
+            use wasm_bindgen::js;
+
+            #[wasm_bindgen]
+            pub fn delete_property(target: &JsValue, property_key: &JsValue) -> JsValue {
+                let result = js::Reflect::delete_property(target, property_key);
+                let result = match result {
+                    Ok(val) => val,
+                    Err(_err) => "TypeError".into()
+                };
+                result
+            }
+        "#,
+        )
+        .file(
+            "test.ts",
+            r#"
+            import * as assert from "assert";
+            import * as wasm from "./out";
+
+            export function test() {
+                const object = {
+                    property: 42
+                };
+
+                wasm.delete_property(object, 'property');
+
+                assert.equal(object.property, undefined);
+
+                const array = [1, 2, 3, 4, 5];
+                wasm.delete_property(array, 3);
+
+                assert.equal(array[3], undefined);
+            }
+        "#,
+        )
+        .test()
 }