Bump MSRV to 1.70 following ravif

.github/workflows/rust.yml

@@ -38,14 +38,14 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        rust: ["1.67.1", nightly, beta]
+        rust: ["1.70.0", nightly, beta]
     steps:
     - uses: actions/checkout@v4
 
     - uses: dtolnay/rust-toolchain@nightly
-      if: ${{ matrix.rust == '1.67.1' }}
+      if: ${{ matrix.rust == '1.70.0' }}
     - name: Generate Cargo.lock with minimal-version dependencies
-      if: ${{ matrix.rust == '1.67.1' }}
+      if: ${{ matrix.rust == '1.70.0' }}
       run: cargo -Zminimal-versions generate-lockfile
 
     - uses: dtolnay/rust-toolchain@v1
@@ -58,7 +58,7 @@ jobs:
     - name: build
       run: cargo build -v
     - name: test
-      if: ${{ matrix.rust != '1.67.1' }}
+      if: ${{ matrix.rust != '1.70.0' }}
       run: cargo test -v && cargo doc -v
 
   test_other_archs:

Cargo.toml

@@ -5,7 +5,7 @@ edition = "2021"
 resolver = "2"
 
 # note: when changed, also update test runner in `.github/workflows/rust.yml`
-rust-version = "1.67.1"
+rust-version = "1.70.0"
 
 license = "MIT OR Apache-2.0"
 description = "Imaging library. Provides basic image processing and encoders/decoders for common image formats."