Without vim-go installed, the new HelmSyntax function fails

[andrewstuart]

I believe this will not work unless you have https://github.com/fatih/vim-go installed and enabled for yaml filetypes (since it is the one providing the gotexttmpl.vim).

I don't think this should be default since it will error out for most users like so:

Originally posted by @jemag in #9 (comment)