JS: Add tests with semi-internal class problem

javascript/ql/test/library-tests/ModelGeneration/semi-internal-class/package.json

@@ -0,0 +1,4 @@
+{
+    "name": "semi-internal-class",
+    "main": "semi-internal-class.js"
+}

javascript/ql/test/library-tests/ModelGeneration/semi-internal-class/semi-internal-class.js

@@ -0,0 +1,21 @@
+export class PublicClass {
+    publicMethod() {}
+}
+
+class SemiInternalClass {
+    method() {
+        return new PublicClass();
+    }
+}
+
+export function get() {
+    return new SemiInternalClass();
+}
+
+export function getAnonymous() {
+    return new (class {
+        method() {
+            return new PublicClass();
+        }
+    });
+}