fix: fix typing issue with update

Author: prisca-c

src/file.ts

@@ -44,12 +44,14 @@ export class File<T = unknown> extends DataBuddyUtils implements FileInterface<T
     return this.read({ path, filename })
   }
 
+  async update(params: BaseParams & { data: T; mode?: 'replace' }): Promise<ReturnData<T>>
+  async update(params: BaseParams & { data: Partial<T>; mode: 'merge' }): Promise<ReturnData<T>>
   async update({
     path,
     filename,
     data,
     mode = 'replace',
-  }: BaseParams & { data: T; mode?: 'replace' | 'merge' }): Promise<ReturnData<T>> {
+  }: BaseParams & { data: T | Partial<T>; mode?: 'replace' | 'merge' }): Promise<ReturnData<T>> {
     this.validatePathAndFilename(path, filename)
     const workingPath = this.workingPath(path)
 
@@ -65,7 +67,7 @@ export class File<T = unknown> extends DataBuddyUtils implements FileInterface<T
       }
       updatedData = { ...currentData, ...data }
     } else {
-      updatedData = data
+      updatedData = data as T
     }
 
     await fs.writeFile(`${workingPath}/${filename}.json`, JSON.stringify(updatedData, null, 4))

src/types/file_interface.ts

@@ -36,16 +36,15 @@ export interface FileInterface<T = unknown> {
    * With mode 'merge', it performs a shallow merge of the updates into existing data.
    * It takes an object with `path`, `filename`, `data`, and optional `mode`.
    * It returns a Promise that resolves with the updated data from the file or null if an error occurs.
-   *
-   * @param {BaseParams & { data: T; mode?: 'replace' | 'merge' }} { path, filename, data, mode }
-   * @returns {Promise<ReturnData<T>>}
    */
+  update(params: BaseParams & { data: T; mode?: 'replace' }): Promise<ReturnData<T>>
+  update(params: BaseParams & { data: Partial<T>; mode: 'merge' }): Promise<ReturnData<T>>
   update({
     path,
     filename,
     data,
     mode,
-  }: BaseParams & { data: T; mode?: 'replace' | 'merge' }): Promise<ReturnData<T>>
+  }: BaseParams & { data: T | Partial<T>; mode?: 'replace' | 'merge' }): Promise<ReturnData<T>>
 
   /**
    * The `delete` method is used to delete a file.