v0.13.18

Bug Fixes

• preprocessor: Improve handling of failed preprocessors (e726d1c), closes #1521

Features

• cli: Add .config/karma.conf.js to the default lookup path (49bf1aa), closes #1387
• config: Add a clearContext config to prevent clearing of context. (5fc8ee7)
• config: mime config option support (d562383), closes #1735