meson: Update minimum version to 0.57.0

Required for c++20 suppport.

Change-Id: Ida3bdf9615505f7fcc360f5dd246fda5066d6ba5
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/meson.build b/meson.build
index da5b938..dfb9658 100644
--- a/meson.build
+++ b/meson.build
@@ -1,7 +1,7 @@
 project(
   'gpioplus',
   'cpp',
-  version: '0.1', meson_version: '>=0.53.2',
+  version: '0.1', meson_version: '>=0.57.0',
   default_options: [
     'warning_level=3',
     'cpp_std=c++17',