Add "--apply-constraints" in Travis so that "bashbrew from" doesn't fail on "windows-amd64"

bashbrew/travis.sh

@@ -45,7 +45,7 @@ cmds=(
 if [ "$extraCommands" ]; then
 	cmds+=(
 		'list --build-order'
-		'from'
+		'from --apply-constraints'
 	)
 fi