[IDP-2269] Wait 3 days of release age unless it's Workleap dependencies

[asimmon]

Important

I ended up scope creeping this PR as there were a few referenced packages in the system tests that did not exist in nuget.org (ex: Hangfire.NetCore 1.7.0). Some other packages were private (Hangfire Pro). The code style was a mess. Method names weren't explanatory, so I fixed that too.

Planned changes

• Wait 3 days of release age unless it's Workleap dependencies.
• Add system tests.

Scope creep

• Auto-merge more Microsoft/well-known dependencies.
• Use case-insensitive regexes.
• Use coding standards.
• Improve tests and method names.
• Inject (more) language hints in raw string literals.