It is now possible to configure the notification for Microsoft Edge and Microsoft Internet Explorer separately.
Before, Edge was treated as the direct successor of IE (what it actually is). But some users wanted to notify outdated Edge versions but keep supporting Internet Explorer 11.
Now you can pass for example required:{'e':15,'i':11} to require Internet Explorer >=11 and Edge >=15 on your site.
By default, passing only one of "i" or "e" options falls back to the old mode and treats both the same.
It is also now possible to notify minor, patch and build version numbers of browsers. This means you can now pass a string, e.g.
c:"64.0.3282.16817" to require at least Chrome Version 64.0.3282.16817 which uses version numbers like MAJOR.MINOR.BUILD.PATCH.
And this is also useful for Microsoft Edge which uses MAJOR.BUILD as the version number pattern, for example
15.15254, 14.14332 or 12.10136, to address versions between major releases.