[Bug]: Storybook sees arrow function properties as string properties

[Samuel-Therrien-Beslogic]

Describe the bug

Storybook sees arrow function properties as string properties

To Reproduce

Create a component with an arrow function

Create a stories with it

Observe that the input has Set string instead of Set object

System

Storybook Environment Info:

  System:
    OS: Windows 11 10.0.22631
    CPU: (16) x64 11th Gen Intel(R) Core(TM) i7-11800H @ 2.30GHz
  Binaries:
    Node: 18.20.2 - C:\Program Files\nodejs\node.EXE
    Yarn: 1.22.19 - ~\AppData\Roaming\npm\yarn.CMD
    npm: 9.4.2 - C:\Program Files\nodejs\npm.CMD <----- active
  Browsers:
    Edge: Chromium (123.0.2420.97)
  npmPackages:
    eslint-plugin-storybook: ^0.8.0 => 0.8.0

Additional context

No response

[shilman]

cc @valentinpalkovic