Update to API v1.6 released

[desmos-api-announce]

Desmos has released an update to API v1.6 that contains some bugfixes and security improvements. We encourage partners to incorporate the patch at their earliest convenience.

The main driver behind this update is a jQuery upgrade. At the time of the original v1.6 release, the Desmos API depended on an older version of the jQuery library. While running static analysis tools against code that bundled the API, some partners were getting warnings about an outdated jQuery dependency with some known vulnerabilities. While there is no evidence that any of these vulnerabilities were actually exploitable in the calculator, we decided it was time to upgrade jQuery to the current stable version as a precaution.

This patch also includes some bugfixes that have been merged since the original v1.6 release:

• Fix the redo keyboard shortcut on macOS.

• Fix a bug where, at certain mobile screen dimensions, the expressions list would shift to accommodate the onscreen keypad even if { keypad:false } was set.