See pvdlg/karma-rollup-preprocessor#148

The karma dependency is defined in package.json as ^4.3.0 and the last version released (that triggered Greenkeeper) is ^4.4.1 which is in range.

Also the first line of the PR incorrectly specify:

The devDependency karma was updated from 3.1.4 to 4.4.1.

I don't know if that's relevant but I previously had karma dependency defined as ^3.0.0 in the package.json and Greenkeeper opened a PR to update it. Because I had many Greenkeeper PRs opened for many dependencies, instead of merging them 1 by 1, I created a manual PR with all the dependencies update and then I closed the Greenkeeper PRs.
So here is the possible reproduction step:

• package.json with karma ^3.0.0
• Karma release 4.0.0 => GreenKeeper open a PR
• Karma release other patch/minor versions => GreenKeeper update the PR
• Update manually package.json with karma ^4.3.0
• Close the GreenKeeper PR
• Karma release version 4.4.1 => GreenKeeper open the incorrect PR Update karma to the latest version 🚀 pvdlg/karma-rollup-preprocessor#148