[Snyk] Security upgrade cloudevents from 3.1.0 to 4.0.0 (#377)

* fix: examples/typescript-ex/package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-AXIOS-1038255

* chore: update example to use the 4.0 API

Signed-off-by: Lucas Holmquist <lholmqui@redhat.com>

Co-authored-by: Lucas Holmquist <lholmqui@redhat.com>

Author: snyk-bot

examples/typescript-ex/package.json

@@ -28,6 +28,6 @@
     "typescript": "~3.9.5"
   },
   "dependencies": {
-    "cloudevents": "~3.1.0"
+    "cloudevents": "~4.0.0"
   }
 }

examples/typescript-ex/src/index.ts

@@ -1,4 +1,4 @@
-import { CloudEvent, CloudEventV1, Receiver } from "cloudevents";
+import { CloudEvent, CloudEventV1, HTTP } from "cloudevents";
 
 export function doSomeStuff(): void {
   const myevent: CloudEventV1 = new CloudEvent({
@@ -21,7 +21,7 @@ export function doSomeStuff(): void {
 
   // Typically used with an incoming HTTP request where myevent.format() is the actual
   // body of the HTTP
-  console.log("Received structured event:", Receiver.accept(headers, myevent));
+  console.log("Received structured event:", HTTP.toEvent({headers, body: myevent}));
 
   // ------ receiver binary
   const data = {
@@ -38,8 +38,8 @@ export function doSomeStuff(): void {
     "ce-extension1": "extension1",
   };
 
-  console.log("My binary event:", Receiver.accept(attributes, data));
-  console.log("My binary event extensions:", Receiver.accept(attributes, data));
+  console.log("My binary event:", HTTP.toEvent({headers: attributes, body: data}));
+  console.log("My binary event extensions:", HTTP.toEvent({headers: attributes, body: data}));
 
 }