feat: upgrade to puppeteer 2.x.x

[abraham]

Fixes peerDependencies warning.

npm WARN pptr-testing-library@0.4.0 requires a peer of puppeteer@^1.5.0 but none is installed. You must install peer dependencies yourself.

[patrickhulce]

thanks @abraham! WDYT about using || to allow either 1.x or 2.x rather than force everyone onto 2.x?

[abraham]

@patrickhulce I'd keep the peerDependencies as just 2.x since the tests are only running against 2.x. People can still use 1.x if they want with a warning.

[patrickhulce]

People can still use 1.x if they want with a warning.

I could say the same to you for 2.x and close this ;)

We're already running a test matrix against old versions of puppeteer in travis. Why not just add 1.19 + 2.0 to it and be more flexible with peer dependencies?

[abraham]

I've updated it to "^1.5.0 || ^2.0.0"

[patrickhulce]

thanks very much @abraham!