Misc cleanups

- Tweak TryFrom usage
- Add beta to CI to catch clippy changes sooner
- Apply updated MSRV to clippy.toml

.circleci/config.yml

@@ -22,6 +22,7 @@ workflows:
                 '__msrv__', # won't add any other toolchains, just uses what's in the docker image
                 '1.60.0', # minimum needed to build dev-dependencies
                 'stable',
+                'beta',
                 'nightly'
               ]
 

RELEASE-NOTES.md

@@ -1,3 +1,8 @@
+# 0.21.3
+
+- Implement `source` instead of `cause` on Error types
+- Roll back MSRV to 1.48.0 so Debian can continue to live in a time warp
+
 # 0.21.2
 
 - Rollback MSRV to 1.57.0 -- only dev dependencies need 1.60, not the main code

clippy.toml

@@ -1 +1 @@
-msrv = "1.57.0"
+msrv = "1.48.0"

src/alphabet.rs

@@ -1,8 +1,7 @@
 //! Provides [Alphabet] and constants for alphabets commonly used in the wild.
 
 use crate::PAD_BYTE;
-use core::convert::TryFrom;
-use core::fmt;
+use core::{convert, fmt};
 #[cfg(any(feature = "std", test))]
 use std::error;
 
@@ -125,7 +124,7 @@ impl Alphabet {
     }
 }
 
-impl TryFrom<&str> for Alphabet {
+impl convert::TryFrom<&str> for Alphabet {
     type Error = ParseAlphabetError;
 
     fn try_from(value: &str) -> Result<Self, Self::Error> {
@@ -203,6 +202,7 @@ pub const BIN_HEX: Alphabet = Alphabet::from_str_unchecked(
 #[cfg(test)]
 mod tests {
     use crate::alphabet::*;
+    use core::convert::TryFrom as _;
 
     #[test]
     fn detects_duplicate_start() {