Pin TypeScript to 5.0.3

[smaye81]

This pins Connect-ES to TypeScript 5.0.3 for the time being. The repo is seeing test failures with 5.1 and this will pin to the working version until we can further investigate.

The failing test is should leave source dangling in packages/connect/src/protocol/async-iterable.spec.ts, which is relying on the finally not being called. Upgrading to 5.1 results in finally getting invoked and the expected array being of size 2.

FWIW, the 5.1 behavior may actually be the correct behavior and it could be this test is relying on a fixed bug.

For additonal reading, see:

• for await of loops don't call AsyncIterator.return() on early exit microsoft/TypeScript#52936
• Ensure call return() for an abrupt completion at for await of loop microsoft/TypeScript#52754
• In for-await-of, only call return() for an abrupt completion in user code microsoft/TypeScript#51297
• for await transform incorrectly calls return when next throws microsoft/TypeScript#50525