meson_options.txt -> meson.options

The new format for this file seems to be meson.options.  Move to it.

Update the minimum meson version to 1.3.  1.1 is the minimum required
for meson.options, but we already have warnings about features in 1.3,
so might as well go straight there.

Tested: Code compiles

Change-Id: Id42643d4aeb680032754158e061ddbf1c9658477
Signed-off-by: Ed Tanous <ed@tanous.net>
diff --git a/meson.build b/meson.build
index 42f2470..e1bbeeb 100644
--- a/meson.build
+++ b/meson.build
@@ -2,7 +2,7 @@
     'bmcweb',
     'cpp',
     version: '1.0',
-    meson_version: '>=0.63.0',
+    meson_version: '>=1.3.0',
     default_options: [
         'b_lto_mode=default',
         'b_lto_threads=0',