fix: Fix transform-keys for primitive data

src/admin.ts

@@ -2,7 +2,7 @@ import { Http } from './http';
 import { AdminRepositories } from './repositories';
 
 export class AdminFacadeRepositories {
-  constructor(readonly http: Http, readonly version: string) {}
+  constructor(private readonly http: Http, private readonly version: string) {}
 
   readonly account = new AdminRepositories.AccountRepository(
     this.http,

src/masto.ts

@@ -60,10 +60,10 @@ export interface SearchParams extends DefaultPaginationParams {
 
 export class FacadeRepositories {
   constructor(
-    readonly http: Http,
-    readonly ws: Ws,
+    private readonly http: Http,
+    private readonly ws: Ws,
     readonly version: string,
-    readonly config: MastoConfig,
+    private readonly config: MastoConfig,
   ) {}
 
   readonly admin = new AdminFacadeRepositories(this.http, this.version);

src/serializers/transform-keys.ts

@@ -22,10 +22,14 @@ export const transformKeys = <T>(
     return data.map((value) => transformKeys(value, transform)) as unknown as T;
   }
 
-  return fromEntries<T>(
-    Object.entries(data).map(([key, value]) => [
-      transform(key),
-      isObject(value) ? transformKeys(value, transform) : value,
-    ]) as any,
-  );
+  if (isObject(data)) {
+    return fromEntries<T>(
+      Object.entries(data).map(([key, value]) => [
+        transform(key),
+        isObject(value) ? transformKeys(value, transform) : value,
+      ]) as any,
+    );
+  }
+
+  return data;
 }