"invalid pixel coordinate" is thrown while pinching

Description

A math.gl exception is thrown during a pinch out (zoom in) gesture, if pitch is 90, and no minZoom is set.

Expected Behavior

No exception should be thrown.

Repro Steps

• Open https://deck.gl/playground
• Change the selected style's initialViewState to the following:

  "initialViewState": {
    "longitude": -1.4157267858730052,
    "latitude": 52.232395363869415,
    "zoom": 6.6,
    "maxZoom": 15,
    "pitch": 90,
    "maxPitch": 90,
    "bearing": -27.396674584323023
  }

• Try to pinch outwards (zoom in)
• Observe math.gl exception being thrown

Environment

• Framework Version: deck.gl 8.4.20
• Browser Version: Chrome 91.0.4472.114
• OS: macOS 12.0 beta

Logs

Error: invalid pixel coordinate
    at assert (assert.js:3)
    at pixelsToWorld (web-mercator-utils.js:188)
    at WebMercatorViewport.getMapCenterByLngLatPosition (web-mercator-viewport.js:127)
    at LinearInterpolator.interpolateProps (linear-interpolator.js:97)
    at TransitionManager._onTransitionUpdate (transition-manager.js:167)
    at Transition.update (transition.js:71)
    at TransitionManager.updateTransition (transition-manager.js:77)
    at TransitionManager._triggerTransition (transition-manager.js:136)
    at TransitionManager.processViewStateChange (transition-manager.js:65)
    at MapController.setProps (controller.js:198)

Reproduce the pinch gesture in the deck.gl playground with the supplied initialViewState, then start from web-mercator-utils.js and WebMercatorViewport.getMapCenterByLngLatPosition in the stack trace. Trace the transition through linear-interpolator.js and MapController, and verify that pinching at pitch 90 with no minZoom completes without an "invalid pixel coordinate" exception.