From d0d46305ab1f5f067db215b46e721807afc755ef Mon Sep 17 00:00:00 2001
From: Steven Allen <steven@stebalien.com>
Date: Tue, 17 Oct 2023 16:11:38 -0700
Subject: [PATCH] chore: update minimum rust version

Also update to 2021 edition.
---
 Cargo.toml     | 4 ++--
 rust-toolchain | 2 +-
 src/key.rs     | 2 --
 3 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/Cargo.toml b/Cargo.toml
index 5c0a815..b555101 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,9 +3,9 @@ name = "bls-signatures"
 version = "0.15.0"
 authors = ["dignifiedquire <dignifiedquire@gmail.com>"]
 license = "MIT OR Apache-2.0"
-edition = "2018"
+edition = "2021"
 resolver = "2"
-rust-version = "1.63.0"
+rust-version = "1.67.1"
 
 description = "Aggregate BLS Signatures"
 documentation = "https://docs.rs/bls-signatures"
diff --git a/rust-toolchain b/rust-toolchain
index af92bdd..737e2ba 100644
--- a/rust-toolchain
+++ b/rust-toolchain
@@ -1 +1 @@
-1.63.0
+1.67.1
diff --git a/src/key.rs b/src/key.rs
index b7797f9..95df77e 100644
--- a/src/key.rs
+++ b/src/key.rs
@@ -245,8 +245,6 @@ fn key_gen<T: AsRef<[u8]>>(data: T) -> Scalar {
 /// https://tools.ietf.org/html/draft-irtf-cfrg-bls-signature-02#section-2.3
 #[cfg(feature = "blst")]
 fn key_gen<T: AsRef<[u8]>>(data: T) -> Scalar {
-    use std::convert::TryInto;
-
     let data = data.as_ref();
     assert!(data.len() >= 32, "IKM must be at least 32 bytes");