refactor: move including bindgen functions to libnotify mod

src/functions.rs

@@ -1,6 +1,6 @@
 use crate::utils::c_str_to_rs_str_and_free;
 
-include!(concat!(env!("OUT_DIR"), "/bindings.rs"));
+use crate::libnotify::*;
 
 /* Initting
  *

src/lib.rs

@@ -3,5 +3,6 @@
 #![allow(non_snake_case)]
 
 pub mod functions;
+mod libnotify;
 pub mod notification;
 mod utils;

src/libnotify.rs

@@ -0,0 +1 @@
+include!(concat!(env!("OUT_DIR"), "/bindings.rs"));

src/notification.rs

@@ -1,4 +1,4 @@
-include!(concat!(env!("OUT_DIR"), "/bindings.rs"));
+use crate::libnotify::*;
 
 pub enum Urgency {
     Low,