Bump dependabot-core from 0.76.10 to 0.81.1

Bumps dependabot-core from 0.76.10 to 0.81.1.

Changelog

Sourced from dependabot-core's changelog.

v0.81.1, 10 December 2018

• Rust: Register cargo metadata finder

v0.81.0, 10 December 2018

• Extract Rust logic into a separate gem

v0.80.1, 10 December 2018

• Add another missing require
• Add missing require

v0.80.0, 10 December 2018

• Extract .NET logic into a separate gem

v0.79.4, 10 December 2018

• Python: Update remaining relative paths following reorg

v0.79.3, 10 December 2018

• Python: Update requirement path in PipfileVersionResolver
• Exclude merge commits when looking for latest dependabot commit message

v0.79.2, 9 December 2018

• Python: Catch ValueError and treat as a FileNotEvaluatable error

v0.79.1, 9 December 2018

• Python: Add system dependencies into Dockerfile

v0.79.0, 9 December 2018

• Extract python logic into a separate gem
• Yarn: Fix lockfile for invalid resolutions

v0.78.0, 7 December 2018

• Extract git_submodules logic into a separate gem

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

... (truncated)

Commits

• 6ef43eb v0.81.1
• 422eeb2 Rust: Register cargo metadata finder
• f7de685 v0.81.0
• b9508a9 Merge pull request #842 from dependabot/reorg-rust
• 016d176 Update for Rust 1.31.0
• c5bd918 Fix rubocops
• b61f016 Update config files
• 57f0786 Get tests working
• a5ff0fa Move rest of Rust
• e8e8f84 Get tests working
• Additional commits viewable in compare view