Navigation: Improve .push() and introduce .replace() method #148

Resources:
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Stencil version: (run npm list @stencil/core from a terminal/cmd prompt and paste output below):

+-- @stencil/core@2.19.3                                        
+-- @stencil/sass@2.0.0                                         
| `-- @stencil/core@2.19.3 deduped                              
`-- stencil-router-v2@0.6.0                                     
  +-- @stencil/core@2.19.3 deduped                              
  `-- @stencil/store@1.5.0                                      
    `-- @stencil/core@2.19.3 deduped

I'm submitting a ... (check one with "x")
[ ] bug report
[x] feature request
[ ] support request => Please do not submit support requests here, use one of these channels: https://forum.ionicframework.com/ or https://stencil-worldwide.slack.com

Current behavior:
There is currently 1 supported way to programmatically navigate to another route: Router.push(url: string).

Expected behavior:
history.pushState accepts a state object as the first argument. It would be very helpful if Router.push() accepted a second (optional) argument for that purpose.
Furthermore, it would be great if the library supported not only pushState, but also history.replaceState, e.g. Router.replace(). This is currently a blocker for us to move to this library.