build: 1.17.3 and ensure all https in yarn lock

[josephperrott]

No description provided.

[alan-agius4]

@josephperrott It is very unlikely that this PR will apply cleanly on the patch branch, since you amended the lock file.

[alan-agius4]

Umm.. fail("Unknown Yarn version {}".format...))

[clydin]

This will need to be bumped to 10.16 as well:
https://github.com/angular/angular-cli/blob/master/.circleci/config.yml#L203

The Node 10 job only runs on master.

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