Bump dependabot-omnibus from 0.113.20 to 0.113.21

Bumps dependabot-omnibus from 0.113.20 to 0.113.21.

Changelog

Sourced from dependabot-omnibus's changelog.

v0.113.21, 19 November 2019

• Bump npm from 6.13.0 to 6.13.1 in /npm_and_yarn/helpers
• Bump https-proxy-agent in /npm_and_yarn/helpers
• Bump prettier from 1.18.2 to 1.19.1 in /npm_and_yarn/helpers
• Fix Gitlab API commit file type to match GitHub's submodule type

Commits

• 18207d6 v0.113.21
• 4f7182b Merge pull request #1520 from dependabot/dependabot/npm_and_yarn/npm_and_yarn...
• 58721b8 Merge pull request #1521 from dependabot/dependabot/npm_and_yarn/npm_and_yarn...
• b163137 Bump npm from 6.13.0 to 6.13.1 in /npm_and_yarn/helpers
• e722b6b Fix flaky composer spec by pinning latest allowable version
• 3cf5be8 [Security] Bump https-proxy-agent in /npm_and_yarn/helpers
• ada9a3e Merge pull request #1511 from dependabot/dependabot/npm_and_yarn/npm_and_yarn...
• 44084e5 Merge pull request #1501 from RodrigoPetter/master
• 6aa8c46 Bump prettier from 1.18.2 to 1.19.1 in /npm_and_yarn/helpers
• 81e320a Add dry run setup for testing ignore conditions and security advisories
• Additional commits viewable in compare view