[sinclairzx81]

This PR is a publishing branch for the following PR's

• Guard the next value before comparing typed-array constructors #1727
• Escape object-key fragments in Value.Diff paths #1728

Additional

This PR also implements a small internal refactor, moving the EncodeFragment() function to the Pointer module, and updating the internal exports for both Pointer and Resolve. There is also a function name change in the Pointer module, renaming the Indices() function to Fragments() to match the Encode/Decode pairing.

Note: The Indices() function is technically an undocumented internal API exported specifically for TB's test suite. The 1.4.6 update changes name on the basis the function is internal, but will introduce a deprecated alias if problems arise. The name change is expected to be zero impact.