Expose cursor

[nedredmond]

Add a cursor function to the API to get the cursor from the private controller. We use it a lot in our functions.

any type is not ideal, but that's its type in our codebase currently, and getting a real type is a big investment of effort. While trying to stabilize with the new update, let's keep things simple.

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
5 out of 9 committers have signed the CLA.

:white_check_mark: sclower
:white_check_mark: eluberoff
:white_check_mark: nedredmond
:white_check_mark: mikehaverstock
:white_check_mark: jwmerrill
:x: jared-hughes
:x: janemiceli
:x: joshwcomeau
:x: jeresig
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[nedredmond]

Wrong repository. My apologies.