Add foreignObject as a dedicated SVG element (fixes #4813) (#4926)

* Add foreignObject to isSVG list; Fix for #4813

* Remove extra comma, alphabetize

Author: zephraph

src/platforms/web/util/element.js

@@ -25,8 +25,8 @@ export const isHTMLTag = makeMap(
 // this map is intentionally selective, only covering SVG elements that may
 // contain child elements.
 export const isSVG = makeMap(
-  'svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,' +
-  'font-face,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
+  'svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' +
+  'foreignObject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
   'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view',
   true
 )