make property_string module public

Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>

proxmox-schema/src/lib.rs

@@ -19,7 +19,7 @@ pub use const_regex::ConstRegexPattern;
 pub mod de;
 pub mod format;
 
-pub(crate) mod property_string;
+pub mod property_string;
 
 mod schema;
 pub use schema::*;