Add compat data for SVG <altGlyphDef> (#1505)
Add compat data for SVG <altGlyphDef> (#1505)



teoli2003/browser-compat-data,mdn/browser-compat-data,mdn/browser-compat-data,chrisdavidmills/browser-compat-data,chrisdavidmills/browser-compat-data