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e1b9d5f3cd
Moodle announced that support for IE would be dropped back in August 2020 with Moodle 3.9 but not active steps were taken at that time. That decision was made in MDLSITE-6109 and this particular step was meant to be taken in Moodle 3.10. This is the first step taken to actively drop support for IE. This commit also bumps the browser support pattern from 0.25% to 0.3%. The percentage here includes any browser where at least this percentage of users worldwide may be using a browser. In this case it causes support for Android 4.3-4.4 to be dropped, which relate to Android KitKat (released 2013). This combination of changes means that all of the supported browsers in our compatibility list support modern features including async, for...of, classes, native Promises, and more which has a huge impact on the ease of debugging code, and drastically reduces the minified file size because a number of native Polyfills included by Babel are no longer included.