Installation of mac brew vim version 8.1 I'm using brew vim which is currently at version 8.0.1850 but 8.1 has just been released and I'm wondering if there is a way to upgrade to it yet? I've done some digging and can't see an option to do it.
There is a pull request on homebrew's github to update the Vim formula to 8.1: https://github.com/Homebrew/homebrew-core/pull/27983

When that merges, just run brew upgrade vim.

If you want to install 8.1 yourself, you can do so by cloning and following the build instructions on the vim official repo: https://github.com/vim/vim.