always fit to bbox if exists

[andrewharvey]

@tristen this undos #30 which was done to address #23, however I can't understand why it's needed?

As a counter example see:

  {
      "id": "locality.10733803972294880",
      "type": "Feature",
      "place_type": [
        "locality"
      ],
      "relevance": 1,
      "properties": {
        "wikidata": "Q2733536"
      },
      "text": "Cronulla",
      "place_name": "Cronulla, Sydney, New South Wales, Australia",
      "bbox": [
        151.14313749261,
        -34.07764546406,
        151.16526158076,
        -34.03901257567
      ],
      "center": [
        151.152,
        -34.0574
      ],
      "geometry": {
        "type": "Point",
        "coordinates": [
          151.152,
          -34.0574
        ]
      },
      "context": [
        {
          "id": "postcode.8858496765414730",
          "text": "2230"
        },
        {
          "id": "place.4960085988742460",
          "wikidata": "Q3130",
          "text": "Sydney"
        },
        {
          "id": "region.3703",
          "short_code": "AU-NSW",
          "wikidata": "Q3224",
          "text": "New South Wales"
        },
        {
          "id": "country.3104",
          "short_code": "au",
          "wikidata": "Q408",
          "text": "Australia"
        }
      ]
    }

Currently it won't fit to the bbox since it has 4 context items, instead choosing to zoom in to zoom 16 (default options.zoom) which is far greater than if it fit to the bbox.

The original issue was "1 Broadway, Manhattan, New York, New York 10004, United States" which doesn't return a bbox so would still be fine even with this PR.

[tristen]

Looks like a sensible change! tbh I can't remember why that would have addressed the issue at the time 😛