Support circular dependencies

[tivac]

Description

The dependency-graph instance used in the rollup plugin for tracking JS chunk usage of CSS files needed to have circular dependency support turned on.

Motivation and Context

Fixes #539

How Has This Been Tested?

Added test specimens that introduced a circular dependency, added test to run them, test passes after change and output looks correct.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[codecov]

Codecov Report

Merging #541 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master     #541   +/-   ##
=======================================
  Coverage   99.16%   99.16%           
=======================================
  Files          41       41           
  Lines         962      962           
  Branches      148      148           
=======================================
  Hits          954      954           
  Misses          8        8

Impacted Files	Coverage Δ
packages/rollup/rollup.js	100% <100%> (ø)	⬆️

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