fix: further implementationerror in mongo DB client

Author: kriswest

src/db/file/repo.ts

@@ -97,7 +97,7 @@ export const createRepo = async (repo: Repo): Promise<Repo> => {
       if (err) {
         reject(err);
       } else {
-        resolve(doc ? toClass(doc, Repo.prototype) : null);
+        resolve(toClass(doc, Repo.prototype));
       }
     });
   });

src/db/helper.ts

@@ -1,7 +1,7 @@
-export const toClass = function (obj: any, proto: any) {
-  obj = JSON.parse(JSON.stringify(obj));
-  obj.__proto__ = proto;
-  return obj;
+export const toClass = function <T, U>(obj: T, proto: U): U {
+  const out = JSON.parse(JSON.stringify(obj));
+  out.__proto__ = proto;
+  return out as U;
 };
 
 export const trimTrailingDotGit = (str: string): string => {