unwrap_none 0.1.2

Implements the `unwrap_none` and `expect_none` methods removed by https://github.com/rust-lang/rust/pull/83349
Documentation 
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## How to use

```rust
use unwrap_none::UnwrapNone;

fn main() {
	None.unwrap_none();
	None.expect_none("Value is not None");
}
```