build: Update to c++20 and meson >= 0.57.0

Change-Id: I52b281d6389e7b5fbc3f1c9fd158d9a1ef23b4c6
Signed-off-by: Willy Tu <wltu@google.com>
diff --git a/meson.build b/meson.build
index 154ef19..d6f5c96 100644
--- a/meson.build
+++ b/meson.build
@@ -2,9 +2,9 @@
   'google-ipmi-sys',
   'cpp',
   version: '0.1',
-  meson_version: '>=0.51.0',
+  meson_version: '>=0.57.0',
   default_options: [
-    'cpp_std=c++17',
+    'cpp_std=c++20',
     'warning_level=3',
     'werror=true',
   ])