def version
      @version ||= IO.popen([@path, "--version"]) do |io|
        io.gets[VERSION_PATTERN, 1]
      end
    rescue => e
      raise Error, "Couldn't load #{@path}: #{e}"
    end
def version
      @version ||= IO.popen([@path, "--version"]) do |io|
        io.gets[VERSION_PATTERN, 1]
      end
    rescue => e
      raise Error, "Couldn't load #{@path}: #{e}"
    end
Fetch the +nvim+ version.

 @return [String]