Merge pull request alex88#26 from easolhq/heroku-22

Support `heroku-22` stack

Author: brandoncc

bin/detect

@@ -1,6 +1,6 @@
 #! /bin/bash
 
-SUPPORTED_STACKS=(heroku-16 heroku-18 heroku-20)
+SUPPORTED_STACKS=(heroku-16 heroku-18 heroku-20 heroku-22)
 
 for stack_option in "${SUPPORTED_STACKS[@]}"; do
   if [[ $STACK = $stack_option ]]; then

build.sh

@@ -3,7 +3,7 @@
 # set -x
 set -e
 
-STACK_VERSIONS=(16 18 20)
+STACK_VERSIONS=(16 18 20 22)
 
 for stack_version in "${STACK_VERSIONS[@]}"; do
   image_name=libvips-heroku-$stack_version:$VIPS_VERSION