Updated CI

Author: ankane

.github/workflows/build.yml

@@ -2,7 +2,7 @@ name: build
 on: [push, pull_request]
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@v4
       - uses: ankane/setup-postgres@v1
@@ -21,18 +21,21 @@ jobs:
           CXXFLAGS=-std=c++17 ./configure
           make
           sudo make install
+
       - run: g++ -std=c++17 -Wall -Wextra -Werror -o test/pqxx test/pqxx_test.cpp -lpqxx -lpq
       - run: test/pqxx
 
-      - if: ${{ startsWith(matrix.os, 'ubuntu') }}
-        run: |
+      - run: g++ -std=c++20 -Wall -Wextra -Werror -o test/pqxx test/pqxx_test.cpp -lpqxx -lpq
+      - run: test/pqxx
+
+      - run: g++ -std=c++23 -Wall -Wextra -Werror -o test/pqxx test/pqxx_test.cpp -lpqxx -lpq
+      - run: test/pqxx
+
+      - run: |
           sudo apt-get update
           sudo apt-get install valgrind
           valgrind --leak-check=yes test/pqxx
 
-      - if: ${{ startsWith(matrix.os, 'macos') }}
-        run: /opt/homebrew/opt/llvm@18/bin/scan-build --status-bugs g++ -std=c++17 -o test/pqxx test/pqxx_test.cpp -lpqxx -lpq
-
       # test install
       - run: cmake -S . -B build
       - run: cmake --build build