Update to c++20 and meson >= 0.57.0

Signed-off-by: Dung Cao <dung@os.amperecomputing.com>
Change-Id: I77519eccadcf9ac5eda9cd89543683770eeb0911
diff --git a/meson.build b/meson.build
index f9a1793..758f670 100644
--- a/meson.build
+++ b/meson.build
@@ -1,9 +1,10 @@
 project('ssifbridge', 'cpp',
+    meson_version: '>=0.57.0',
     default_options: [
         'buildtype=debugoptimized',
         'warning_level=3',
         'werror=true',
-        'cpp_std=c++17'
+        'cpp_std=c++20',
     ],
     version: '1.0',
 )