Change log for the Variable numeric question type

Changes in 2.0

This version works with Moodle 4.0.
Switch from Travis to Github actions.

Changes in 1.9

Support for Moodle mobile app for questions that don't use the superscripts/subscript editor.
Better grading when the allowed error is very small.
Update Behat tests to pass with Moodle 3.8.

Changes in 1.8

Fix Behat tests to work with Moodle 3.6.

Changes in 1.7

Privacy API implementation.
Update to use the newer editor_ousupsub, instead of editor_supsub.
Setup Travis-CI automated testing integration.
Fix a bug with grading a response of '0' in combined questions.
Fix some automated tests to pass with newer versions of Moodle.
Fix some coding style.
Due to privacy API support, this version now only works in Moodle 3.4+ For older Moodles, you will need to use a previous version of this plugin.

1.6 and before

Changes were not documented here.