Prerequisites

• I have written a descriptive issue title
• I have searched existing issues to ensure the bug has not already been reported

Fastify version

N/A (installed the package by itself)

Plugin version

1.1.0

Node.js version

16.14.0

Operating system

Linux

Operating system version (i.e. 20.04, 11.3, 10)

Ubuntu 22.04

Description

I installed this package in a TS project (without fastify server) and this error appeared as soon as I tried to create the merge function.

I'm using typescript 4.7.3.

Let me know if I can help you troubleshoot further.

Steps to Reproduce

I believe it should be sufficient to create a plain TS repo and then write the same code in the above screenshot.

Expected Behavior

Error should not happen.