[Snyk] Security upgrade dagre from 0.7.4 to 0.8.1

[snyk-bot]

Snyk has created this PR to fix one or more vulnerable packages in the `npm` dependencies of this project.

Changes included in this PR

• Changes to the following files to upgrade the vulnerable dependencies to a fixed version:
  • package.json

Vulnerabilities that will be fixed

With an upgrade:

Severity	Issue	Breaking Change	Exploit Maturity
	Prototype Pollution SNYK-JS-LODASH-567746	No	Proof of Concept

Commit messages

Package name: dagre

The new version differs by 24 commits.

• 45c7ef4 Prep v0.8.1 release
• 43ef07d Switch dagre back to a top level npm package
• 4d0c2cf Fix up require for graphlib in bench script
• 587d725 Bump version and set as pre-release
• a299bf8 Prep for dagre v0.8.0 release
• 980b6e2 Add Matthew Dahl to contributors
• 12a0754 Complete support for lodash 4
• 7e2528e Fix up more lodash 4 API changes
• 590b155 More fixes for lodash 4 API changes
• 1687a28 More fixes for lodash 4 API changes
• d284539 Fix bugs with lodash 4
• 38e1fdf Initial work to move to lodash 4
• 5c5f6eb Merge pull request #224 from dagrejs/update_repo_badge_svg
• 7d700c4 Merge pull request #169 from saravanak/clean_gitignore
• c367859 Merge pull request #197 from jawshooah/trailing-comma
• b2bcbaa Update repo badge to SVG
• f5e622c Remove deprecation warning
• 8bddb46 Bump version and set as pre-release
• 7b8dc3c Prep v0.7.5 release
• 67534ad Prep for move to @dagrejs org
• e66c29b Update README.md
• 23cdaaa Remove trailing comma
• 3d48b63 Bump version and set as pre-release
• fe716d2 Fix gitignore to work correctly with the silver searcher

See the full diff

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