fix(deps): upgrade babel and babel-loader

Integration MRs

• gitlab!33387 (closed)
• https://gitlab.com/gitlab-org/customers-gitlab-com/-/merge_requests/1465
• status-page!92 (closed)

What does this MR do?

Upgraded babel and related dependencies to their latest versions

• @babel/core: 7.4.5 -> 7.10.1 CHANGELOG
• @babel/preset-env: 7.8.0 -> 7.10.1 CHANGELOG
• @babel/standalone: 7.3.4 -> 7.10.1 CHANGELOG
• babel-loader: 8.0.5 -> 8.1.0 CHANGELOG

diff_after_babel_upgrade.patch

Does this MR meet the acceptance criteria?

Conformity

• Code review guidelines.
• GitLab UI's contributing guidlines.
• If it changes a Pajamas-compliant component's look & feel, the MR has been reviewed by a UX designer.
• If it changes GitLab UI's documentation guidelines, the MR has been reviewed by a Technical Writer.
• If the MR changes a component's API, integration MR(s) have been opened in the following projects to ensure that the @gitlab/ui package can be upgraded quickly after the changes are released:
  • GitLab: gitlab!33387 (closed)
  • Customers Portal: https://gitlab.com/gitlab-org/customers-gitlab-com/-/merge_requests/1465
  • Status Page: status-page!92 (closed)
• Added the ~"component:*" label(s) if applicable.