#15 Use old grep syntax for inverted matches

run/scripts/update

@@ -9,7 +9,7 @@ if [[ -n ${PHP_VERSION} ]]; then
     echo "Image updated"
     NEWIMAGEID=$(docker image ls -q registry.lakedrops.com/docker/l3d/php-${PHP_VERSION}:${VERSION} | head -1)
     while true; do
-      IMAGEID=$(docker image ls -q registry.lakedrops.com/docker/l3d/php-${PHP_VERSION} | grep --invert-match ${NEWIMAGEID})
+      IMAGEID=$(docker image ls -q registry.lakedrops.com/docker/l3d/php-${PHP_VERSION} | grep -v ${NEWIMAGEID})
       if [[ -n ${IMAGEID} ]]; then
         while true; do
           ID=$(docker container ls -q -f ancestor=${IMAGEID})