Update package.json dependencies to latest versions

[DonJayamanne]

We need to do this before we end up in a situation where our dependencies are too old.
We've been caught out to this in the past, and once again now #2745.
Need to review all dependencies and update for the next release.

[DonJayamanne]

@brettcannon @qubitron
Please could you ensure this gets added into the next sprint.

[brettcannon]

This is a matter of us getting on to Component Governance, as that will let us unpin our dependencies, but that's a bigger task as it requires setting up a parallel build of the extension internally in Azure DevOps.

[brettcannon]

We are now registered with Component Governance, so we can now begin unpinning our dependencies. We should probably start by switching to the carrot operator and see how that goes and then consider further upgrade beyond that on a case-by-case basis.