chore(deps): Update Rust crate ctor to 0.8.0 (#181)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [ctor](https://redirect.github.com/mmastrac/rust-ctor) | dependencies
| minor | `0.6.3` → `0.8.0` |

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Author: epage

Cargo.lock

@@ -27,7 +27,7 @@ pre-release-replacements = [
 default = []
 
 [dependencies]
-ctor = { version = "0.6.3", default-features = false, features = [] }
+ctor = { version = "0.8.0", default-features = false, features = [] }
 
 [dev-dependencies]