"Maximum call stack size exceeded error" with 3.0.9

[dmarcey]

It looks like the update to 3.0.9 introduced an infinite loop in the <relative-time /> element.

Repro Link:
https://codesandbox.io/s/thirsty-joliot-44k9p
Repro Steps:

• Open link
• Open browser console
• Refresh

Uncaught RangeError: Maximum call stack size exceeded.
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at HTMLElement.attributeChangedCallback (time-elements-legacy.js:248)
    at evaluate (index.js? [sm]:6)
    at Jn (eval.js:61)
    at e.value (transpiled-module.ts:980)
    at e.value (manager.ts:361)
    at t (transpiled-module.ts:958)
    at loadResources (index.html:3)

Compare to https://codesandbox.io/s/wizardly-dew-7pih0 which is using 3.0.8 and does not have the issue.

Here is the relevant code:

if (title && (!currentTitle || currentTitle === oldTitle)) {
        this.setAttribute('title', title);
      }

which I think was modified in this PR:
#129