Fix: update workflow configs to drop ruby 3.0

Author: akerekes

.github/workflows/buildpack-integration-test.yml

@@ -23,5 +23,5 @@ jobs:
       cloudevent-builder-source: 'test/conformance'
       cloudevent-builder-target: 'cloudevent_func'
       prerun: ${{format('test/conformance/prerun.sh {0} testdata/conformance/function', github.event_name == 'pull_request' && github.event.pull_request.head.sha || github.sha )}}
-      builder-runtime: 'ruby30'
-      builder-runtime-version: '3.0'
+      builder-runtime: 'ruby31'
+      builder-runtime-version: '3.1'

.github/workflows/conformance.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby: ['3.0', '3.1', '3.2', '3.3']
+        ruby: ['3.1', '3.2', '3.3']
     steps:
     - name: Harden Runner
       uses: step-security/harden-runner@4d991eb9b905ef189e4c376166672c3f2f230481 # v2.11.0

.github/workflows/lint.yml

@@ -28,10 +28,10 @@ jobs:
 
     - name: Checkout repo
       uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
-    - name: Install Ruby 3.0
+    - name: Install Ruby 3.1
       uses: ruby/setup-ruby@6c79f721fa26dd64559c2700086ac852c18e0756 # v1.225.0
       with:
-        ruby-version: "3.0"
+        ruby-version: "3.1"
         bundler-cache: true
     - name: Install toys
       run: gem install --no-document toys

.github/workflows/push-gh-pages.yml

@@ -10,7 +10,7 @@ permissions: read-all
 jobs:
   push-gh-pages:
     env:
-      ruby_version: "3.0"
+      ruby_version: "3.1"
     runs-on: ubuntu-latest
 
     permissions:

.github/workflows/unit.yml

@@ -16,7 +16,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        ruby: ['3.0', '3.1', '3.2', '3.3']
+        ruby: ['3.1', '3.2', '3.3']
         flags: ["--only --test-unit"]
         include:
           - os: ubuntu-latest
@@ -26,13 +26,13 @@ jobs:
             ruby: truffleruby
             flags: "--only --test-unit"
           - os: macos-latest
-            ruby: "3.0"
+            ruby: "3.1"
             flags: "--only --test-unit"
           - os: windows-latest
-            ruby: "3.0"
+            ruby: "3.1"
             flags: "--only --test-unit"
           - os: ubuntu-latest
-            ruby: "3.0"
+            ruby: "3.1"
             flags: "--only --test-yardoc --test-build --test-examples"
       fail-fast: false
     runs-on: ${{ matrix.os }}