provide buttons option when simulate mapbox-gl mousemove

 - required after github.com/mapbox/mapbox-gl-js/pull/9512

Author: archmoj

test/jasmine/tests/mapbox_test.js

@@ -1693,7 +1693,9 @@ describe('mapbox plots', function() {
 
     function _mouseEvent(type, pos, cb) {
         return new Promise(function(resolve) {
-            mouseEvent(type, pos[0], pos[1]);
+            mouseEvent(type, pos[0], pos[1], {
+                buttons: 1 // left button
+            });
 
             setTimeout(function() {
                 cb();

test/jasmine/tests/plot_api_react_test.js

@@ -2303,7 +2303,9 @@ describe('Test Plotly.react + interactions under uirevision:', function() {
         // see mapbox_test.js for rationale
         function _mouseEvent(type, pos) {
             return new Promise(function(resolve) {
-                mouseEvent(type, pos[0], pos[1]);
+                mouseEvent(type, pos[0], pos[1], {
+                    buttons: 1 // left button
+                });
                 setTimeout(resolve, 100);
             });
         }