deps: update rust crate clap to 4.3.21 (#114)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [clap](https://togithub.com/clap-rs/clap) | dependencies | patch |
`4.3.19` -> `4.3.21` |

---

### Release Notes

<details>
<summary>clap-rs/clap (clap)</summary>

###
[`v4.3.21`](https://togithub.com/clap-rs/clap/blob/HEAD/CHANGELOG.md#4321---2023-08-08)

[Compare
Source](https://togithub.com/clap-rs/clap/compare/v4.3.20...v4.3.21)

##### Features

-   Expose `TryMapValueParser` so the type can be named

###
[`v4.3.20`](https://togithub.com/clap-rs/clap/blob/HEAD/CHANGELOG.md#4320---2023-08-08)

[Compare
Source](https://togithub.com/clap-rs/clap/compare/v4.3.19...v4.3.20)

##### Features

-   `Command::mut_args` for modifying all arguments en masse

</details>

---

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Cargo.toml

@@ -13,7 +13,7 @@ repository = "https://github.com/YoloDev/cargo-featurex"
 [dependencies]
 bitarr = "0.2.0"
 cargo_metadata = "0.17.0"
-clap = { version = "4.3.19", features = ["derive"] }
+clap = { version = "4.3.21", features = ["derive"] }
 error-stack = "0.3.1"
 itertools = "0.11.0"
 lasso = { version = "0.7.2", features = ["ahasher"] }