feat: add option to configure tracked analytics

Add similar behavious as in @cloudinary/url-gen for configuring tracked analytics and update tests.

Closes #590

Author: raae

lib/utils/index.js

@@ -827,11 +827,17 @@ function url(public_id, options = {}) {
   }
 
   let urlAnalytics = ensureOption(options, 'urlAnalytics', false);
+  let trackedAnalytics = ensureOption(options, 'trackedAnalytics', false);
 
-  if (urlAnalytics === true) {
+  if (urlAnalytics === true || trackedAnalytics) {
     let sdkVersions = getSDKVersions();
-    let analyticsOptions = getAnalyticsOptions(Object.assign({}, options, sdkVersions));
 
+    if (trackedAnalytics) {
+      sdkVersions = trackedAnalytics;
+      sdkVersions.urlAnalytics = true;
+    }
+
+    let analyticsOptions = getAnalyticsOptions(Object.assign({}, options, sdkVersions));
     let sdkAnalyticsSignature = getSDKAnalyticsSignature(analyticsOptions);
 
     // url might already have a '?' query param

test/unit/sdkAnalytics/imageTagWithAnalytics.spec.js

@@ -65,4 +65,21 @@ describe('Tests for sdk analytics through image tag', function () {
 
     expect(imgStr).to.contain(`src='http://res.cloudinary.com/${TEST_CLOUD_NAME}/image/upload/hello.png?_s=AMAlhAMA`);
   });
+
+  it('Reads from tracked analytics configuration', () => {
+    process.versions = {
+      node: '12.0.0'
+    };
+
+    let imgStr = cloudinary.image("hello", {
+      format: "png",
+      trackedAnalytics: {
+        sdkCode: "X",
+        sdkSemver: "7.3.0",
+        techVersion: "3.4.7"
+      }
+    });
+
+    expect(imgStr).to.contain(`src='http://res.cloudinary.com/${TEST_CLOUD_NAME}/image/upload/hello.png?_s=AXAEzGT0`);
+  });
 });