Bump dependabot-core from 0.76.10 to 0.77.2

Bumps dependabot-core from 0.76.10 to 0.77.2.

Changelog

Sourced from dependabot-core's changelog.

v0.77.2, 7 December 2018

• Add top level docker file that requires docker classes

v0.77.1, 7 December 2018

• Simplify dependabot-docker gemspec
• Add /pkg to gitignore

v0.77.0, 7 December 2018

• Move Docker support to a separate gem

v0.76.11, 7 December 2018

• Python: Ignore dependencies that we had to insert a version for
• JS(npm): Raise helpful errer for forbidden missing deps
• Gradle: Don't consider dependencies that concatenate properties to build a version
• Maven: Check distribution type when looking up declaration to update

Commits

• 7e85312 v0.77.2
• 3531273 Add top level docker file that requires docker classes
• 8c5299a v0.77.1
• 8b0825a Simplify dependabot-docker gemspec
• 6f8585a Add /pkg to gitignore
• 6163dd1 v0.77.0
• f07d9cd Merge pull request #830 from dependabot/reorg-docker
• 0358383 Update Dockerfile and CircleCI config
• e7a973a Fix some config
• 82e8f30 Rename test-missing-dep-version-npm-package
• Additional commits viewable in compare view