These plugins add functionality to automatically close and surround text
with parantheses, brackets, quotes, etc.
Overwrite the vim-surround default bindings since they conflict with my
substitute bindings.
Since the vim plugins are stored in submodules and vim-plug is not a big
fan of that when installing (Needs PlugClean and PlugInstall again
although the repos of the plugins were already pulled) it makes more
sense to me to use vim8s native plugin management.
