client/io_uring/meson: bump cpp version

fe2b0233 · Florian Fischer · 4c9a76fc · fe2b0233
Commit fe2b0233 authored Nov 25, 2021 by Florian Fischer
--- a/clients/io_uring/meson.build
+++ b/clients/io_uring/meson.build
@@ -2,8 +2,7 @@ project('io_uring_echo_client', 'cpp',
  version: '0.0.1',
  default_options : [
    'warning_level=3',
-    'c_std=gnu11',
-    'cpp_std=c++2a',
+    'cpp_std=c++20',
    'b_ndebug=if-release',
    'werror=true',
  ]