chore: update github ci

Author: ije

.github/workflows/testing.yml

@@ -37,7 +37,7 @@ jobs:
         run: deno cache deps.ts
 
       - name: Deno test
-        run: deno test -A --unstable --location "http://localhost/"
+        run: deno test -A --unstable --import-map=import_map.json --location=https://deno.land/x/aleph
 
       - name: Cargo test
         run: cd compiler && cargo test --all