Stencil version:

@stencil/core@1.3.0

I'm submitting a:

[x] bug report
[ ] feature request
[ ] support request

Current behavior:
svg's viewBox attribute is lowercase causing the svg's size set to 0x0

Expected behavior:
viewBox attribute not set to 'viewbox'

Steps to reproduce:
https://github.com/aztack/functional-svg-bug

Related code:

// insert any relevant code here

Other information:
There should be a white arrow before Buttons.
I searched the issues and found #1247 which is marked 'fixed'.

But, if I put a svg tag inside the render function, it will be rendered correctly:

Maybe it's hard to detect that one component is using a functional component which contains svg tag.
What about give compiler a hint hasSvg:

@Component({
  hasSvg: true
});