ShadowRoot.mode and ShadowRoot.delegatesFocus properties are enumerable in synthetic shadow

[pmdartus]

Description

Currently, the ShadowRoot.mode and ShadowRoot.delegatesFocus properties are defined as enumerable, while they shouldn't.

const elm = createElement('x-test', { is: Test });
document.body.appendChild(elm);

console.log(Object.keys(elm.shadowRoot));
// Actual: ["mode", "delegatesFocus"]
// Expected: []

Version

• LWC: 0.35.4

[pmdartus]

Fixed with #998