Bump karma-rollup-preprocessor from 6.0.1 to 6.1.0

Created by: dependabot-preview[bot]

Bumps karma-rollup-preprocessor from 6.0.1 to 6.1.0.

Changelog

Sourced from karma-rollup-preprocessor's changelog.

[6.1.0] - 2018-10-17

Added

• More info log output. [lephyrus](https://github.com/lephyrus) #39

Fixed

• Fix caching memory leak. [lephyrus](https://github.com/lephyrus) #38
• Add generated source map to Karma's file object. [Lalem001](https://github.com/Lalem001) #38

Commits

• e19f906 release 6.1.0
• 00e5b8d Add generated source map to Karma's file object
• e8a6739 Add more logging to provide better feedback
• 5b26cdb Fix memory leak caused by caching
• See full diff in compare view

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