support v6 api in MapboxGeocoder class

pre-validate reverse coordinates to avoid v6 4xx response

fix limit=1 on reverse geocodes when single type set

enable multiple reverse results when no types or limit specified

fix promise resolution

revert package-lock file

fix potential problem with address strings for v5 and v6

debug/index.js

@@ -85,7 +85,9 @@ var geocoder = new MapboxGeocoder({
         .then(response => response.json())
     }
   },
-  mapboxgl: mapboxgl
+  mapboxgl: mapboxgl,
+  reverseGeocode: true,
+  version: 'v6',
 });
 
 map.addControl(geocoder)

debug/mock-api.json

@@ -1,3 +1,66 @@
 [
-  {"id":"place.7673410831246050","type":"Feature","place_type":["place"],"relevance":1,"properties":{"wikidata":"Q61"},"text_en-US":"Washington","language_en-US":"en","place_name_en-US":"Washington, District of Columbia, United States of America","text":"Washington","language":"en","place_name":"SERVER: Washington, District of Columbia, United States of America","matching_place_name":"Washington, DC, United States of America","bbox":[-77.1197609567342,38.79155738,-76.909391,38.99555093],"center":[-77.0366,38.895],"geometry":{"type":"Point","coordinates":[-77.0366,38.895]},"context":[{"id":"region.14064402149979320","short_code":"US-DC","wikidata":"Q3551781","text_en-US":"District of Columbia","language_en-US":"en","text":"District of Columbia","language":"en"},{"id":"country.19678805456372290","wikidata":"Q30","short_code":"us","text_en-US":"United States of America","language_en-US":"en","text":"United States of America","language":"en"}]}
-]
+  {
+    "type": "Feature",
+    "id": "address.7840146147075390",
+    "geometry": {
+      "type": "Point",
+      "coordinates": [22.476772, -33.991656]
+    },
+    "properties": {
+      "mapbox_id": "address.7840146147075390",
+      "feature_type": "address",
+      "name": "12 Main Street",
+      "coordinates": {
+        "longitude": 22.476772,
+        "latitude": -33.991656,
+        "accuracy": "proximate"
+      },
+      "place_formatted": "George, Western Cape 6529, South Africa",
+      "match_code": {
+        "address_number": "matched",
+        "street": "unmatched",
+        "postcode": "unmatched",
+        "place": "unmatched",
+        "region": "unmatched",
+        "locality": "not_applicable",
+        "country": "inferred",
+        "confidence": "low"
+      },
+      "context": {
+        "address": {
+          "id": "address.7840146147075390",
+          "street": "Main Street",
+          "address_number": "12",
+          "name": "12 Main Street"
+        },
+        "neighborhood": {
+          "id": "neighborhood.1846526",
+          "name": "Ballotsview"
+        },
+        "postcode": {
+          "id": "postcode.24039166",
+          "name": "6529"
+        },
+        "place": {
+          "id": "place.24643838",
+          "name": "George",
+          "wikidata_id": "Q370456"
+        },
+        "region": {
+          "id": "region.9470",
+          "name": "Western Cape",
+          "wikidata_id": "Q127167",
+          "region_code": "WC",
+          "region_code_full": "ZA-WC"
+        },
+        "country": {
+          "id": "country.8958",
+          "name": "South Africa",
+          "wikidata_id": "Q258",
+          "country_code": "ZA",
+          "country_code_alpha_3": "ZAF"
+        }
+      }
+    }
+  }
+]

lib/events.js

@@ -179,7 +179,8 @@ MapboxEventManager.prototype = {
       routing: geocoder.options.routing,
       worldview: geocoder.options.worldview,
       mapZoom: zoom,
-      keyboardLocale: this.locale
+      keyboardLocale: this.locale,
+      apiVersion: geocoder.options.version
     }
 
     // get the text in the search bar