JS: model process as an EventEmitter

javascript/ql/src/semmle/javascript/frameworks/NodeJSLib.qll

@@ -935,6 +935,15 @@ module NodeJSLib {
     ImportedNodeJSEventEmitter() { this = getAnEventEmitterImport().getAnInstantiation() }
   }
 
+  /**
+   * The NodeJS `process` object as an EventEmitter subclass.
+   */
+  private class ProcessAsNodeJSEventEmitter extends NodeJSEventEmitter {
+    ProcessAsNodeJSEventEmitter() {
+      this = process()
+    }
+  }
+
   /**
    * A class that extends EventEmitter.
    */