Update puppeteer to v22+ for the tests

Seeing this consistently in https://github.com/fregante/webext-dynamic-content-scripts/pull/70

```
● static: iframe › should load the content script after a reload, once

Execution context was destroyed, most likely because of a navigation.

69 | it('should load the content script after a reload, once', async () => {
70 | await iframe.goto(iframe.url());
> 71 | await expect(iframe).toMatchElement('.web-ext');
| ^
72 | await expectToNotMatchElement(iframe, '.web-ext + .web-ext');
73 | });
74 | });

at Object. (test/browser.js:71:3)

● dynamic: iframe › should load the content script after a reload, once

Execution context was destroyed, most likely because of a navigation.

69 | it('should load the content script after a reload, once', async () => {
70 | await iframe.goto(iframe.url());
> 71 | await expect(iframe).toMatchElement('.web-ext');
| ^
72 | await expectToNotMatchElement(iframe, '.web-ext + .web-ext');
73 | });
74 | });

at Object. (test/browser.js:71:3)
```

Related:
- https://github.com/fregante/webext-dynamic-content-scripts/issues/64