better type safety for ts 3.8 ?

Author: mydea

dev-packages/node-integration-tests/utils/runner.ts

@@ -365,15 +365,16 @@ export function createRunner(...paths: string[]) {
         }
       }
 
-      const serverStartup = withSentryServer
+      const serverStartup: Promise<[port: number | undefined, close: (() => void) | undefined]> = withSentryServer
         ? createBasicSentryServer(newEnvelope)
         : Promise.resolve([undefined, undefined]);
 
       const dockerStartup: Promise<VoidFunction | undefined> = dockerOptions
         ? runDockerCompose(dockerOptions)
         : Promise.resolve(undefined);
 
-      const startup = Promise.all([dockerStartup, serverStartup]);
+      const startup: Promise<[VoidFunction | undefined, [port: number | undefined, close: (() => void) | undefined]]> =
+        Promise.all([dockerStartup, serverStartup]);
 
       startup
         .then(([dockerChild, [mockServerPort, mockServerClose]]) => {