ci: start testing against 3.1

Note that this commit doesn't include building or testing native gem
support for Ruby 3.1.

.github/workflows/ci.yml

@@ -21,7 +21,7 @@ jobs:
   rubocop:
     runs-on: ubuntu-latest
     container:
-      image: ghcr.io/sparklemotion/nokogiri-test:mri-3.0
+      image: ghcr.io/sparklemotion/nokogiri-test:mri-3.1
     steps:
       - uses: actions/checkout@v2
         with:
@@ -47,7 +47,7 @@ jobs:
           submodules: true
       - uses: MSP-Greg/setup-ruby-pkgs@v1
         with:
-          ruby-version: "3.0"
+          ruby-version: "3.1"
           apt-get: "ragel"
           brew: "ragel"
           mingw: "ragel"
@@ -78,7 +78,7 @@ jobs:
       fail-fast: false
       matrix:
         sys: ["enable", "disable"]
-        ruby: ["2.6", "2.7", "3.0"]
+        ruby: ["2.6", "2.7", "3.0", "3.1"]
     runs-on: ubuntu-latest
     container:
       image: ghcr.io/sparklemotion/nokogiri-test:mri-${{matrix.ruby}}
@@ -101,7 +101,7 @@ jobs:
       fail-fast: false
       matrix:
         sys: ["enable", "disable"]
-        ruby: ["2.6", "2.7", "3.0"]
+        ruby: ["2.6", "2.7", "3.0", "3.1"]
     runs-on: ubuntu-latest
     container:
       image: ghcr.io/sparklemotion/nokogiri-test:mri-${{matrix.ruby}}
@@ -160,7 +160,7 @@ jobs:
       fail-fast: false
       matrix:
         sys: ["enable"]
-        ruby: ["3.0"]
+        ruby: ["3.1"]
     env:
       BUNDLE_GEMFILE: "Gemfile-libxml-ruby"
     runs-on: ubuntu-latest
@@ -185,7 +185,7 @@ jobs:
       fail-fast: false
       matrix:
         sys: ["disable"]
-        ruby: ["3.0"]
+        ruby: ["3.1"]
     env:
       BUNDLE_GEMFILE: "Gemfile-libxml-ruby"
     runs-on: ubuntu-latest
@@ -210,7 +210,7 @@ jobs:
       fail-fast: false
       matrix:
         sys: ["enable", "disable"]
-        ruby: ["2.6", "2.7", "3.0"]
+        ruby: ["2.6", "2.7", "3.0", "3.1"]
     runs-on: macos-latest
     steps:
       - uses: actions/checkout@v2
@@ -234,7 +234,7 @@ jobs:
       fail-fast: false
       matrix:
         sys: ["enable", "disable"]
-        ruby: ["2.6", "2.7", "3.0", "mingw"]
+        ruby: ["2.6", "2.7", "3.0", "3.1", "mingw"]
     runs-on: windows-latest
     steps:
       - name: configure git crlf
@@ -302,7 +302,7 @@ jobs:
       fail-fast: false
       matrix:
         sys: ["disable"]
-        ruby: ["3.0"]
+        ruby: ["3.1"]
     runs-on: ubuntu-latest
     container:
       image: ghcr.io/sparklemotion/nokogiri-test:mri-${{matrix.ruby}}

.github/workflows/gem-install.yml

@@ -42,7 +42,7 @@ jobs:
       fail-fast: false
       matrix:
         sys: ["enable", "disable"]
-        ruby: ["2.6", "2.7", "3.0", "head"]
+        ruby: ["2.6", "2.7", "3.0", "3.1", "head"]
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
@@ -71,7 +71,7 @@ jobs:
           submodules: true
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: "3.0"
+          ruby-version: "3.1"
       - uses: actions/download-artifact@v2
         with:
           name: cruby-gem
@@ -102,6 +102,29 @@ jobs:
           gem list -d nokogiri
           nokogiri -v
 
+  cruby-windows-install-ucrt:
+    needs: ["cruby-package"]
+    strategy:
+      fail-fast: false
+      matrix:
+        sys: ["enable", "disable"]
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: true
+      - uses: MSP-Greg/setup-ruby-pkgs@v1
+        with:
+          ruby-version: "3.1"
+          mingw: "libxml2 libxslt"
+      - uses: actions/download-artifact@v2
+        with:
+          name: cruby-gem
+          path: gems
+      - run: |
+          gem install --verbose --no-document gems/*.gem -- --${{matrix.sys}}-system-libraries
+          gem list -d nokogiri
+          nokogiri -v
 
   cruby-native-package:
     name: "cruby-native-package"

.github/workflows/upstream.yml

@@ -21,7 +21,7 @@ jobs:
   xmlsoft-head:
     runs-on: ubuntu-latest
     container:
-      image: ghcr.io/sparklemotion/nokogiri-test:mri-3.0
+      image: ghcr.io/sparklemotion/nokogiri-test:mri-3.1
     steps:
       - uses: actions/checkout@v2
         with:
@@ -46,7 +46,7 @@ jobs:
     needs: ["xmlsoft-head"]
     runs-on: ubuntu-latest
     container:
-      image: ghcr.io/sparklemotion/nokogiri-test:mri-3.0
+      image: ghcr.io/sparklemotion/nokogiri-test:mri-3.1
     steps:
       - uses: actions/checkout@v2
         with:
@@ -138,7 +138,7 @@ jobs:
   html5lib-tests:
     runs-on: ubuntu-latest
     container:
-      image: ghcr.io/sparklemotion/nokogiri-test:mri-3.0
+      image: ghcr.io/sparklemotion/nokogiri-test:mri-3.1
     steps:
       - uses: actions/checkout@v2
         with: