ci: fix and update all workflows (#50)

Replace macos-13 runners with macos-latest. The macos-13 runners are
no longer available, causing all macOS CI jobs in the system and
packaged_tarball workflows to be cancelled every week since late 2025.

Update the Ruby matrix across all workflows from [3.0, 3.1, 3.2, 3.3,
3.4, head] to [3.2, 3.3, 3.4, 4.0, head], dropping EOL rubies and
adding 4.0.

Pass CONFIGURE_ARGS with the homebrew libyaml prefix on macOS in the
system workflow. The ruby-dev-builder prebuilt head binary is configured
with --with-openssl-dir and --with-readline-dir but not --with-opt-dir,
so on ARM macOS runners (where homebrew installs to /opt/homebrew rather
than /usr/local) the compiler can't find yaml.h without explicit paths.

Author: flavorjones

.github/workflows/isolated.yml

@@ -23,7 +23,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: ["3.0", "3.1", "3.2", "3.3", "3.4", "head"]
+        ruby: ["3.2", "3.3", "3.4", "4.0", "head"]
         runs-on: ["ubuntu-latest", "macos-latest", "windows-latest"]
     runs-on: ${{matrix.runs-on}}
     steps:

.github/workflows/packaged_source.yml

@@ -23,7 +23,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: ["3.0", "3.1", "3.2", "3.3", "3.4", "head"]
+        ruby: ["3.2", "3.3", "3.4", "4.0", "head"]
         runs-on: ["ubuntu-latest", "macos-latest", "windows-latest"]
     runs-on: ${{matrix.runs-on}}
     steps:

.github/workflows/packaged_tarball.yml

@@ -23,8 +23,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: ["3.0", "3.1", "3.2", "3.3", "3.4", "head"]
-        runs-on: ["ubuntu-latest", "macos-13", "windows-latest"]
+        ruby: ["3.2", "3.3", "3.4", "4.0", "head"]
+        runs-on: ["ubuntu-latest", "macos-latest", "windows-latest"]
     runs-on: ${{matrix.runs-on}}
     steps:
       - uses: actions/checkout@v4

.github/workflows/system.yml

@@ -23,8 +23,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: ["3.0", "3.1", "3.2", "3.3", "3.4", "head"]
-        runs-on: ["ubuntu-latest", "macos-13", "windows-latest"]
+        ruby: ["3.2", "3.3", "3.4", "4.0", "head"]
+        runs-on: ["ubuntu-latest", "macos-latest", "windows-latest"]
     runs-on: ${{matrix.runs-on}}
     steps:
       - uses: actions/checkout@v4
@@ -36,5 +36,7 @@ jobs:
           mingw: "libyaml" # windows
           apt-get: "libyaml-dev" # linux
           brew: "libyaml" # macos
+      - if: runner.os == 'macOS'
+        run: echo "CONFIGURE_ARGS=--with-libyaml-dir=$(brew --prefix libyaml)" >> $GITHUB_ENV
       - run: bundle exec rake compile test
         working-directory: system