* Upgrade frontend-enterprise and pass in user

ENT-2648

* Add react-router-dom

* Add back caret

Also update node-sass to a compatible version.
Include a regenerated package-lock.

DISCO-1067

It looks like the package maintainers had a v2.1.1 that was on github
but then released a different 2.1.1 to NPM.  When renovate(upgrade
automation) tries to make any changes, it updates the lockfile to point
to the NPM one which currently breaks tests.

Pinning to the correct version in the package.json so that we can get
other things upgraded.

also move mockprock (dev only proctoring service)'s JS to
devDependencies

also manually increment edx-proctoring version, since that's all we
wanted to achieve with this

Also package lock was tricky in how specifically it wanted to be
updated

also ensures that our proctoring JS will run through babel, even while
we have npm dependencies installed on a local-only basis

Updated https://www.npmjs.com/package/@edx/edx-bootstrap version to 1.0.3. Updating it on platform as part of

https://openedx.atlassian.net/browse/LEARNER-3659

This reverts commit 0c8d66bb.

EDUCATOR-2606