build: increase MSRV to 1.74.0

This is what updated dependencies require.

Also update Rust used to build manylinux wheels
from 1.72.0 to 1.76.0.

.github/workflows/ci.yml

@@ -89,9 +89,9 @@ jobs:
           - os: macos-latest
             rust: 1.76.0
 
-          # Minimum Supported Rust Version = 1.70.0
+          # Minimum Supported Rust Version = 1.74.0
           - os: ubuntu-latest
-            rust: 1.70.0
+            rust: 1.74.0
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4

Cargo.toml

@@ -3,7 +3,7 @@ name = "deltachat"
 version = "1.135.1"
 edition = "2021"
 license = "MPL-2.0"
-rust-version = "1.70"
+rust-version = "1.74"
 
 [profile.dev]
 debug = 0

scripts/coredeps/install-rust.sh

@@ -7,7 +7,7 @@ set -euo pipefail
 #
 # Avoid using rustup here as it depends on reading /proc/self/exe and
 # has problems running under QEMU.
-RUST_VERSION=1.72.0
+RUST_VERSION=1.76.0
 
 ARCH="$(uname -m)"
 test -f "/lib/libc.musl-$ARCH.so.1" && LIBC=musl || LIBC=gnu