build: switch to C++20

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Id73b46db149d2abda452a8b35fd25b2c688cf30b
diff --git a/meson.build b/meson.build
index 30e2fd2..b0d2ca0 100644
--- a/meson.build
+++ b/meson.build
@@ -3,8 +3,9 @@
     'cpp',
     version: '1.0',
     default_options: [
-        'cpp_std=c++17',
+        'cpp_std=c++20',
     ],
+    meson_version: '>=0.57.0',
 )
 
 executable(