Hotfix: Fix for Composer Install Issues on Travis

[sghoweri]

Jira

http://vjira2:8080/browse/BDS-2075

Summary

Updates composer dependencies to work around a Composer install issue that just started to pop up on Travis.

Details

I'm not 100% sure on this but I think this fix works because one or more of the following (but probably the first two bullets here):

• We're no longer referencing some older composer dependencies (ex. update Twig to 1.42.5)
• We're switching to using the stable channel instead of the dev channel
• All Github repos referenced have the no-api flag added
• We removed the no-longer-needed Github repo reference to https://github.com/drupal/core-render

How to test

Confirm Travis CI build passes as expected

[remydenton]

Yay, looks like it works!

A couple thoughts:

• Why are we using ${GH_TOKEN} here instead of ${GITHUB_TOKEN} like the rest of the travis.yml file? What is even the difference between those two?
• Can we back out the changes that didn't make a difference before merging?

[remydenton]

As discussed on Slack, this is OK to ship with the earlier changes since composer.lock files don't affect downstream dependencies. Thanks @sghoweri for updating the token.

[sghoweri]

Thanks @remydenton!

[sghoweri]

PR was released with v2.21.0