chore: fix compatibility check for bump PRs

Adds `DOWNLOAD_LATEST=true` when running compatibility check in
build.sh. This prevents the script from attempting to download versions
of the modules that have not been published.

Long term fix will have to distinguish whether the current version in
lerna.json has been published, and if not download latest instead.

build.sh

@@ -60,6 +60,6 @@ echo "==========================================================================
 echo "building..."
 time lerna run $bail --stream $runtarget || fail
 
-/bin/bash scripts/check-api-compatibility.sh
+DOWNLOAD_LATEST=true /bin/bash scripts/check-api-compatibility.sh
 
 touch $BUILD_INDICATOR