Update github test action

Signed-off-by: trivernis <trivernis@protonmail.com>

.github/workflows/build.yml

@@ -45,4 +45,7 @@ jobs:
         run: cargo test --verbose --all --features serialize_postcard
 
       - name: Run json serialization tests
-        run: cargo test --verbose --all --features serialize_json
+        run: cargo test --verbose --all --features serialize_json
+
+      - name: Run all serialization tests
+        run: cargo test --verbose --all --all-features