Upgrade mime-types-data to 3.2019.0331
This saves some disk space by matching the version used in Gitaly.
Only minor changes:
- https://github.com/mime-types/mime-types-data/blob/master/History.md
- https://github.com/mime-types/mime-types-data/compare/v3.2018.0812..v3.2019.0331
This fixes a regression in mime-types-data in the spec: https://github.com/mime-types/mime-types-data/pull/20
Edited by Stan Hu