add release test

Author: s1gr1d

dev-packages/bun-integration-tests/expect.ts

@@ -78,8 +78,9 @@ export function eventEnvelope(
         public_key: 'public',
         trace_id: UUID_MATCHER,
         sample_rate: expect.any(String),
-        ...(includeSampleRand && { sample_rand: expect.stringMatching(/^[01](\.\d+)?$/) }),
         sampled: expect.any(String),
+        ...(event.release !== undefined && { release: expect.any(String) }),
+        ...(includeSampleRand && { sample_rand: expect.stringMatching(/^[01](\.\d+)?$/) }),
       },
     },
     [[{ type: 'event' }, expectedEvent(event, { sdk })]],