build: use Rust 1.71.0 and increase MSRV to 1.66.0

Rust 1.66 is required by constant_time_eq 0.3.0.

.github/workflows/ci.yml

@@ -24,7 +24,7 @@ jobs:
     name: Lint Rust
     runs-on: ubuntu-latest
     env:
-      RUSTUP_TOOLCHAIN: 1.70.0
+      RUSTUP_TOOLCHAIN: 1.71.0
     steps:
       - uses: actions/checkout@v3
       - name: Install rustfmt and clippy
@@ -80,19 +80,19 @@ jobs:
       matrix:
         include:
           - os: ubuntu-latest
-            rust: 1.68.2
+            rust: 1.71.0
           - os: windows-latest
-            rust: 1.68.2
+            rust: 1.71.0
           - os: macos-latest
-            rust: 1.68.2
+            rust: 1.71.0
 
-          # Minimum Supported Rust Version = 1.65.0
+          # Minimum Supported Rust Version = 1.66.0
           #
           # Minimum Supported Python Version = 3.7
           # This is the minimum version for which manylinux Python wheels are
           # built.
           - os: ubuntu-latest
-            rust: 1.65.0
+            rust: 1.66.0
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v3

Cargo.toml

@@ -3,7 +3,7 @@ name = "deltachat"
 version = "1.118.0"
 edition = "2021"
 license = "MPL-2.0"
-rust-version = "1.65"
+rust-version = "1.66"
 
 [profile.dev]
 debug = 0

scripts/zig-musl-check.sh

@@ -9,7 +9,7 @@ set -e
 unset RUSTFLAGS
 
 # Pin Rust version to avoid uncontrolled changes in the compiler and linker flags.
-export RUSTUP_TOOLCHAIN=1.70.0
+export RUSTUP_TOOLCHAIN=1.71.0
 
 ZIG_VERSION=0.11.0-dev.2213+515e1c93e
 

scripts/zig-rpc-server.sh

@@ -8,7 +8,7 @@ set -e
 unset RUSTFLAGS
 
 # Pin Rust version to avoid uncontrolled changes in the compiler and linker flags.
-export RUSTUP_TOOLCHAIN=1.70.0
+export RUSTUP_TOOLCHAIN=1.71.0
 
 ZIG_VERSION=0.11.0-dev.2213+515e1c93e