Change errorMessages in props to optional

[mst-mkt]

Issue

resolve #63

Description

The errorMessages in props was not set to optional and has been corrected.

• before

<Camera /> // ❌ error: Property 'errorMessages' is missing in type '{ ref: RefObject<CameraType>; aspectRatio: number; }' but required in type 'CameraProps'.

• after

<Camera /> // ⭕ ok

---

Also, I think it has been fixed that if each property of the errorMessages object was omitted, it did not work correctly internally.

• before

<Camera errorMessages={{}} /> // errorMessages.noCameraAccessible <- string | undefined (inside component) ❌

• after

<Camera errorMessages={{}} /> // errorMessages.noCameraAccessible <- string (inside component) ⭕