Install libsqlite3-dev in CI

Hopefully fixes Ruby 2.0-2.4 CI issues.

Also, drop JRuby 9.1, which was readded by accident in the last
commit.

.github/workflows/ci.yml

@@ -32,15 +32,14 @@ jobs:
         ruby: [ "2.0.0", 2.1, 2.3, 2.4, 2.5, 2.6, 2.7, "3.0", 3.1, 3.2, 3.3, 3.4, jruby-9.3, jruby-9.4 ]
         include:
           - { os: ubuntu-22.04, ruby: "1.9.3" }
-          - { os: ubuntu-22.04, ruby: jruby-9.1 }
           - { os: ubuntu-22.04, ruby: jruby-9.2 }
     runs-on: ${{ matrix.os }}
     name: ${{ matrix.ruby }}
     env:
       BUNDLE_GEMFILE: .ci.gemfile
     steps:
     - uses: actions/checkout@v4
-    - run: sudo apt-get -yqq install libpq-dev libmysqlclient-dev
+    - run: sudo apt-get -yqq install libpq-dev libmysqlclient-dev libsqlite3-dev
     - run: sudo apt-get -yqq install libxml2-dev libxslt-dev
       if: startsWith(matrix.ruby, 'truffleruby')
     - uses: ruby/setup-ruby@v1