Upgrade to Rust 1.79.0. (#188)

The release announcement is here:
  https://blog.rust-lang.org/2024/06/13/Rust-1.79.0.html

.circleci/config.yml

@@ -46,7 +46,7 @@ jobs:
             docker run --rm \
               -v $PWD:/code \
               -w /code \
-              rust:1.78.0-alpine3.19 \
+              rust:1.79.0-alpine3.20 \
                 sh -c 'apk add cmake make musl-dev perl && cargo run -p package -- dist'
       - persist_to_workspace:
           root: dist

.github/workflows/ci.yml

@@ -48,5 +48,5 @@ jobs:
           docker run --rm \
             -v $PWD:/code \
             -w /code \
-            rust:1.78.0-alpine3.19 \
+            rust:1.79.0-alpine3.20 \
               sh -c 'apk add cmake make musl-dev perl && cargo run -p package -- dist'

.github/workflows/release.yml

@@ -64,7 +64,7 @@ jobs:
           docker run --rm \
             -v $PWD:/code \
             -w /code \
-            rust:1.78.0-alpine3.19 \
+            rust:1.79.0-alpine3.20 \
               sh -c 'apk add cmake make musl-dev perl && cargo run -p package -- dist'
       - name: Prepare Changelog
         id: prepare-changelog

rust-toolchain

@@ -2,7 +2,7 @@
 # N.B.: Update .github and .circleci yaml to use a matching image, if available.
 # Although a version match is not required (cargo downloads and installs the
 # toolchain described here if not present), it does speed up CI builds.
-channel = "1.78.0"
+channel = "1.79.0"
 components = [
   "cargo",
   "clippy",