Update libxml2 from 2.10.4 to 2.12.6

.github/workflows/ci.yml

@@ -18,17 +18,6 @@ on:
       - '*'
 
 jobs:
-  rubocop:
-    runs-on: ubuntu-latest
-    container:
-      image: ghcr.io/sparklemotion/nokogiri-test:mri-3.1
-    steps:
-      - uses: actions/checkout@v2
-        with:
-          submodules: true
-      - run: bundle install --local || bundle install
-      - run: bundle exec rake rubocop
-
   gumbo:
     needs: ["rubocop"]
     strategy:
@@ -296,25 +285,3 @@ jobs:
             bundle install --local || bundle install
             bundle exec rake compile -- --${{matrix.sys}}-system-libraries
             bundle exec rake test
-
-  memcheck:
-    strategy:
-      fail-fast: false
-      matrix:
-        sys: ["disable"]
-        ruby: ["3.1"]
-    runs-on: ubuntu-latest
-    container:
-      image: ghcr.io/sparklemotion/nokogiri-test:mri-${{matrix.ruby}}
-    steps:
-      - uses: actions/checkout@v2
-        with:
-          submodules: true
-      - uses: actions/cache@v2
-        if: matrix.sys == 'disable'
-        with:
-          path: ports
-          key: ports-ubuntu-${{hashFiles('dependencies.yml', 'patches/**/*.patch')}}
-      - run: bundle install --local || bundle install
-      - run: bundle exec rake compile -- --${{matrix.sys}}-system-libraries
-      - run: bundle exec rake test:memcheck

.github/workflows/downstream.yml

@@ -27,9 +27,6 @@ jobs:
           - url: https://github.com/flavorjones/loofah
             name: loofah
             command: "bundle exec rake test"
-          - url: https://github.com/rails/rails-html-sanitizer
-            name: rails-html-sanitizer
-            command: "bundle exec rake test"
           - url: https://github.com/rgrove/sanitize
             name: sanitize
             command: "bundle exec rake test"
@@ -39,9 +36,6 @@ jobs:
           - url: https://github.com/WinRb/Viewpoint
             name: viewpoint
             command: "bundle exec rspec spec"
-          - url: https://github.com/rails/rails
-            name: xmlmini
-            command: "cd activesupport && bundle exec rake test TESTOPTS=-n/XmlMini/"
           - url: https://github.com/pythonicrubyist/creek
             name: creek
             command: "bundle exec rake spec"

dependencies.yml

@@ -1,7 +1,7 @@
 libxml2:
-  version: "2.10.4"
-  sha256: "ed0c91c5845008f1936739e4eee2035531c1c94742c6541f44ee66d885948d45"
-  # sha-256 hash provided in https://download.gnome.org/sources/libxml2/2.10/libxml2-2.10.4.sha256sum
+  version: "2.12.6"
+  sha256: "889c593a881a3db5fdd96cc9318c87df34eb648edfc458272ad46fd607353fbb"
+  # sha-256 hash provided in https://download.gnome.org/sources/libxml2/2.12/libxml2-2.12.6.sha256sum
 
 libxslt:
   version: "1.1.37"