[BUG]: frameOptions: false not working

[johanhermansson]

Describe the bug

When I set frameOptions: false the library still return the X-Frame-Options header.

The PR https://github.com/trezy/next-safe/pull/38 solves this problem by checking if the right value param is false 😄 , but maybe we should check both the key and value param for false?

Steps To Reproduce

1. Create new Next.js app
2. Setup next-safe:

   nextSafe({
       frameOptions: false
   })
   

3. Start app
4. Still see X-Frame-Options header in response

Version

v3.x.x

Relevant log output

No response

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