Increase docker-compose version requirement

Author: navarr

installing.md

@@ -4,7 +4,7 @@ Installing Warden
 ## Prerequisites
 
 * [Docker Desktop for Mac](https://hub.docker.com/editions/community/docker-ce-desktop-mac) 2.2.0.0 or later or [Docker for Linux](https://docs.docker.com/install/) (Warden has been tested on Fedora 29 and Ubuntu 18.10) or [Docker for Windows](https://docs.docker.com/desktop/windows/install/)
-* `docker-compose` version 1.25.0 or later is required (this can be installed via `brew`, `apt`, `dnf`, or `pip3` as needed)
+* `docker-compose` version 2 or later is required (this can be installed via `brew`, `apt`, `dnf`, or `pip3` as needed)
 * [Mutagen](https://mutagen.io/) 0.11.4 or later is required for environments leveraging sync sessions on Mac OS. Warden will attempt to install this via `brew` if not present.
 
 :::{warning}