SVG standard 1.0 support

We are using the SVG backend. Our documentation pipeline requires SVG 1.0 and I see that the matplotlib/ file hardcodes the version to 1.1. Is it possible to support SVG 1.0?

Likely, from a quick look there isn’t much difference between the two versions (unless I missed something…). Feel free to open an issue on the tracker so that this doesn’t get lost.