Update dependency onpushstate@^0.3.1

[ziir]

Hi 👋

I've noticed the fix for link clicks w/ modifiers is already included in onpushstate@>=0.2.0 but hyperhtml-app is officially locked to onpushstate@^0.1.1.

I've updated my app's lockfile to use onpushstate@0.3.1 and thought other hyperhtml-app users might want these fixes as well. :)

Includes fixes for:

• support for anchor elements in shadowRoot onpushstate#2
• Ignore clicks with ctrl, shift or alt keys pressed onpushstate#1

Thanks a lot for all your work on the viperHTML tech fam 👌

[WebReflection]

Thanks. Published as v1 since path-to-regexp had breaking changes in.