This is a vim plugin for Pushup. It provides syntax highlighting. You should be able to symlink it into your plugin manager's path. Alternatively, to install it manually:

• Locate or create a syntax directory in your vim config directory (Usually ~/.vim/syntax for vim or ~/.config/nvim/syntax for neovim)
• Copy syntax/pushup.vim into that directory
• Locate or create a ftdetect directory in your vim config directory (Usually ~/.vim/ftdetect for vim or ~/.config/nvim/ftdetect for neovim)
• Copy ftdetect/pushup.vim into that directory