bump node and electron 19

[jackkav]

https://www.electronjs.org/releases/stable#19.0.0

TODO:

• add electron 19 to node-libcurl fork

changelog(Improvements): Upgraded to Electron 19

[filfreire]

LGTM! From my side I think we can merge this one.

There was something weird happening, at first I thought it was specific to a PR with latest build like this one:

Take a request like this:

curl --request GET \
  --url 'http://mockbin.org/request/anything?test=test&test2=asaa&foo=baar' \
  --header 'Authorization: Basic YWFhOmFhYQ==' \
  --header 'Content-Type: multipart/form-data' \
  --header 'test: mctest' \
  --form test=test

In latest beta, it seemed to work fine:

In this PR's build, there seemed to be something weird happening:

BUT, I was wrong, it's an unrelated issue with mockbin.org itself.

When I first was building out the request, I set the Authorization as Digest, which seems to make mockbin.org return back the 503 heroku failure page, regardless of these changes.

It may screw up the HTTP connection that can be reused for any subsequent request, despite us disabling Authorization afterwards. It works again by forcing a new HTTP connection (e.g. by changing https://) and picking another Authorization method for the given domain we're trying to hit.

Using another bin that has proper support for Digest auth httpbin.org/digest-auth/auth/aaa/aaa, shows it working: