add npm install to script

Author: ds300

integration-tests/apply-multiple-patches/apply-multiple-patches.sh

@@ -1,10 +1,13 @@
 # make sure errors stop the script
 set -e
 
+npm install
+
 echo "add patch-package"
 npm add $1
 alias patch-package=./node_modules/.bin/patch-package
 
+
 echo "SNAPSHOT: patch-package happily applies both good patches"
 patch-package
 echo "END SNAPSHOT"