fix: Overlay didn't display "npmjs" pages that do not contain a repository element

[aviv1620]

fix issue 148.
#148

content.npmjs.js - mount Overlay based on h3 element title "install" instead of repository element.
utils.js - if the element is not in the page. reject timeout after 10 seconds.
make bugs like this more easy to detect next time.
.gitignore - not pull cache and autogenerated files

[baruchiro]

Thank you!!!

You did good work, but I want some changes. Please comment if you have any questions.

[aviv1620]

I resolve conversations in the lest commit.

content.npmjs.js - use more safe another selector.
utils.js,cache.js and globals.js - define time in globals.js.
utils.js - solve without wrapping promise in race.
yarn.lock - revert.

[baruchiro]

Thanks a lot!

If you're trying to support yarn v3, please explain

[aviv1620]

Which version of yarn do I need to use?
Until now I run the project on my computer in version 3.

[baruchiro]

We're using version 1

[aviv1620]

OK.
I downgrade to yarn v1.

I run yarn set version 1.22.19. I recommend documenting it in README.md in the second "Local Development" steps.

I revert the yarn.lock file. Now the yarn install does not change it.

I will not ignore it now from the .yarn folder. This should fix the error in the Github tests.
In my computer all the tests work: manually, Jest and end-to-end.

[baruchiro]

Very good work!!!