fix: QR code generator (#110)

Author: pozil

README.md

@@ -63,7 +63,7 @@ If installing on a Developer Edition org, you first need to set up **My Domain**
 
 1. Click [this link](https://login.salesforce.com/packaging/installPackage.apexp?p0=04t5p0000013nkIAAQ) to install the host app package and choose **Install for All Users**.
 
-    You'll need to approve access to `https://chart.googleapis.com`. We use this library to draw leaderboards.
+    You'll need to approve access to `https://api.qrserver.com`. We use this library to draw a QR Code.
 
 1. Set up permissions:
     1. Navigate to **Setup > Users > Permission Sets**, click **Quiz Host**

src/main/default/lwc/qrCode/__tests__/qrCode.test.js

@@ -22,7 +22,7 @@ describe('qr-code', () => {
 
         const img = element.shadowRoot.querySelector('img');
         expect(img.src).toBe(
-            `https://chart.googleapis.com/chart?chs=${IMAGE_SIZE}x${IMAGE_SIZE}&cht=qr&chl=${encodeURIComponent(
+            `https://api.qrserver.com/v1/create-qr-code/?size=${IMAGE_SIZE}x${IMAGE_SIZE}&data=${encodeURIComponent(
                 IMAGE_BASE_URL
             )}`
         );