fix WithRecover 无法recover问题

[snail-plus]

What is the purpose of the change

fix WithRecover 无法recover

Brief changelog

add PanicHandler handle error

Verifying this change

XXXX

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[cserwen]

@snail-plus Maybe it would be better to have a simple unit test.

[snail-plus]

@snail-plus Maybe it would be better to have a simple unit test.

ok , I will add a simple unit test later.

[twz915]

Previously, users could reassign the PanicHandler to their own handler, but now they can’t do it.
such as

// 设置recover
primitive.PanicHandler = func(i interface{}) {
    msentry.CaptureMessage(fmt.Sprintf("%+v", i), nil)
}

Please keep the code compatible, thanks!