dependency: bump dependabot-omnibus from 0.138.5 to 0.138.6

Bumps dependabot-omnibus from 0.138.5 to 0.138.6.

Changelog

Sourced from dependabot-omnibus's changelog.

v0.138.6, 26 March 2021

• chore: export LOCAL_GITHUB_ACCESS_TOKEN to docker dev container
• fix: Raise resolvability error when pseudo version does not match version control
• test: Add a helper method to load bundler fixtures by version
• test: Explicitly raise if attempting to load a missing project fixture
• test: Project fixtures for UpdateChecker spec

Commits

• 459026b Merge pull request #3376 from dependabot/v0.138.6-release-notes
• 823f355 v0.138.6
• ef8909b Merge pull request #3373 from dependabot/brrygrdn/latest-version-finder-proj-...
• 2d90e42 Merge pull request #3371 from dependabot/go-modules-slo
• aeebfc6 Merge pull request #3372 from dependabot/export-local-dev-token
• 38a83b2 Project fixtures for UpdateChecker spec
• 9f5e4dc Merge pull request #3370 from dependabot/brrygrdn/update-checker-spec-proj-fi...
• 29d81e7 style: 🚨 👮 🚓
• 0ef33bc Merge pull request #3369 from dependabot/jurre/rm-merge-commits-from-bump-script
• 9017f78 Raise resolvability error when pseudo version does not match version control
• Additional commits viewable in compare view

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