Bump MSRV to 1.74.0

In line with `rust-bitcoin` bump to Rust 1.74.0

Note that other major projects in the Rust Bitcoin eccosystem have or
will, bump to 1.85.0 (in Debian Stable).

The reason I've done this PR is because I'd like to re-write CI in
line with `rust-bitcoin` and bumping the MSRV is easier than debugging
the MSRV job.

Author: tcharding

.github/workflows/rust.yml

@@ -68,15 +68,15 @@ jobs:
         run: ./contrib/test.sh
 
   MSRV:
-    name: Test - 1.56.1 toolchain
+    name: Test - 1.74.0 toolchain
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false
     steps:
       - name: Checkout Crate
         uses: actions/checkout@v4
       - name: Checkout Toolchain
-        uses: dtolnay/rust-toolchain@1.56.1
+        uses: dtolnay/rust-toolchain@1.74.0
       - name: Running test script
         env:
           DO_FEATURE_MATRIX: true

Cargo.toml

@@ -9,7 +9,8 @@ readme = "README.md"
 keywords = ["base32", "encoding", "bech32", "bitcoin", "cryptocurrency"]
 categories = ["encoding", "cryptography::cryptocurrencies"]
 license = "MIT"
-edition = "2018"
+edition = "2021"
+rust-version = "1.74.0"
 
 [features]
 default = ["std"]

clippy.toml

@@ -1,7 +1,7 @@
 [package]
 name = "bech32-fuzz"
 edition = "2021"
-rust-version = "1.56.1"
+rust-version = "1.74.0"
 version = "0.0.1"
 authors = ["Automatically generated"]
 publish = false

fuzz/Cargo.toml

@@ -155,7 +155,7 @@ where
 /// The number of fes encoded by n bytes, rounded up because we pad the fes.
 fn bytes_len_to_fes_len(bytes: usize) -> usize {
     let bits = bytes * 8;
-    (bits + 4) / 5
+    bits.div_ceil(5)
 }
 
 impl<I> ExactSizeIterator for BytesToFes<I>