update javascript submodule

I don't know whether you accept pull requests which update a single submodule, but I'm pretty excited about these [changes][1] so thought I'd ask. :)


[1]: https://github.com/pangloss/vim-javascript/compare/7e28dbd4e06fafb023ac8934d3937be1afbb222e...a1165dca3e0cdc8754ca77ddd99510b1f093c04b