VScode: Use C++20 mode for IntelliSense

Author: alt-graph

.vscode/c_cpp_properties.json

@@ -15,8 +15,8 @@
             },
             "defines": [],
             "compilerPath": "/usr/bin/g++",
-            "cStandard": "c11",
-            "cppStandard": "c++17",
+            "cStandard": "c17",
+            "cppStandard": "c++20",
             "intelliSenseMode": "gcc-x64",
             "compileCommands": "${workspaceFolder}/builddir/compile_commands.json"
         }