Update toml requirement from 0.5 to 0.8 (#335)

* Update toml requirement from 0.5 to 0.8

Updates the requirements on [toml](https://github.com/toml-rs/toml) to permit the latest version.
- [Commits](https://github.com/toml-rs/toml/compare/toml_datetime-v0.5.0...toml-v0.8.0)

---
updated-dependencies:
- dependency-name: toml
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

* docs(settings): update changelog

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Rob Ede <robjtede@icloud.com>

actix-settings/src/lib.rs

@@ -169,7 +169,8 @@ where
     /// Writes the default TOML template to a new file, located at `filepath`.
     ///
     /// # Errors
-    /// Returns a [`FileExists`](crate::AtError::FileExists) error if a file already exists at that
+    ///
+    /// Returns a [`FileExists`](crate::Error::FileExists) error if a file already exists at that
     /// location.
     pub fn write_toml_file<P>(filepath: P) -> AsResult<()>
     where

actix-settings/src/parse.rs

@@ -2,7 +2,7 @@ use std::{path::PathBuf, str::FromStr};
 
 use crate::Error;
 
-/// A specialized `FromStr` trait that returns [`AtError`] errors
+/// A specialized `FromStr` trait that returns [`Error`] errors
 pub trait Parse: Sized {
     /// Parse `Self` from `string`.
     fn parse(string: &str) -> Result<Self, Error>;