build: increase warning level

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Icaf15a6e3037d7078ee77670faae18c5303ed214
diff --git a/meson.build b/meson.build
index 3a8a5cf..b78a71a 100644
--- a/meson.build
+++ b/meson.build
@@ -2,6 +2,7 @@
     default_options: [
       'buildtype=debugoptimized',
       'cpp_std=c++20',
+      'warning_level=3',
       'werror=true',
       'tests=' + (meson.is_subproject() ? 'disabled' : 'auto'),
       'examples=' + (meson.is_subproject() ? 'disabled' : 'auto'),