Use composer 2 as default

To switch versions use:
- `ln -fs composer2 /usr/bin/composer`
- `ln -fs composer1 /usr/bin/composer`

Author: andypost

Makefile

@@ -75,7 +75,8 @@ endif
 	# Set up timezone
 	$(call php-0, cp /usr/share/zoneinfo/Europe/Paris /etc/localtime)
 	$(call php-0, kill -USR2 1)
-	$(call php, composer global require -o --update-no-dev --no-suggest "hirak/prestissimo:^0.3")
+	# Set composer2 as default
+	$(call php-0, ln -fs composer2 /usr/bin/composer)
 
 ## Install backend dependencies
 back: