Bump ic-js

[dskloetd]

Motivation

Keep our ic-js dependency up to date.

In particular, we want to use the timestamp field that was added to the Transaction type of the index canister.

I attempted this with #4663 but had forgotten to publish the changes first.

Changes

1. Ran npm run upgrade:next.
2. Set the timestamp field on test values where it's required.

Tests

Still pass

Todos

• Add entry to changelog (if necessary).
  not necessary

[mstrasinskis]

Thank you!