more upgrade tests

Author: ChuckHend

.github/workflows/extension_upgrade.yml

@@ -62,6 +62,7 @@ jobs:
           git checkout tags/v0.20.0
           # pgrx=0.12.5 required for v0.20.0
           cargo install cargo-pgrx --version 0.12.5 --locked
+          # use integration tests for v0.20.0
           make test-integration
       - name: Test branch's version
         env:

extension/Makefile

@@ -114,4 +114,4 @@ test-update:
 	echo "\q" | make run
 	psql ${DATABASE_URL} -c "CREATE EXTENSION IF NOT EXISTS vectorscale"
 	psql ${DATABASE_URL} -c "ALTER EXTENSION vectorize UPDATE"
-	make test-integration
+	make test-unit