bugfix(@nestjs/core) add circular dependency (related modules) check

Author: kamilmysliwiec

packages/core/injector/module.ts

@@ -287,13 +287,14 @@ export class Module {
     if (this._components.has(token)) {
       return token;
     }
-    const relatedModules = [...this._relatedModules.values()];
-    const modulesTokens = relatedModules
+    const importedArray = [...this._relatedModules.values()];
+    const importedRefNames = importedArray
+      .filter(item => item)
       .map(({ metatype }) => metatype)
       .filter(metatype => metatype)
       .map(({ name }) => name);
 
-    if (modulesTokens.indexOf(token) < 0) {
+    if (importedRefNames.indexOf(token) < 0) {
       const { name } = this.metatype;
       throw new UnknownExportException(name);
     }