feat(updateSize): Add updateSize function to allow redrawing when the canvas size changes (#30)

* adding updateSize function

* making updatesize cleaner

Author: biharck

src/api.js

@@ -41,7 +41,6 @@ import {
 
 import DICOMwebClient from 'dicomweb-client/build/dicomweb-client.js'
 
-
 function _getPixelSpacing(metadata) {
   const functionalGroup = metadata.SharedFunctionalGroupsSequence[0];
   const pixelMeasures = functionalGroup.PixelMeasuresSequence[0];
@@ -697,6 +696,11 @@ class VLWholeSlideMicroscopyImageViewer {
 
   }
 
+  resize(){
+    this[_map].updateSize();
+  }
+  
+
   /* Renders the images.
    */
   render(options) {