Bump version_sorter to version 2.2.4

Dmytro Zaporozhets (DZ)requested to merge
dz-bump-version-sorter into master

What does this MR do?

Bumps version_sorter to version 2.2.4. Current one (2.1.0) was released in August 2016.

I looked on commits list and did not find any breaking change https://github.com/github/version_sorter/commits/master. Should be safe to merge.

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