Revert "Revert "Upgrade JGit dependency to 5.2.1""
Revert "Revert "Upgrade JGit dependency to 5.2.1""

This reverts commit 42b5a32670e43b307ec2b0a34380e373b16be1fe.

overleaf/writelatex-git-bridge,overleaf/writelatex-git-bridge