Switch from lazy_static to once_cell

rust-bindings/rust/Cargo.toml

@@ -34,12 +34,12 @@ members = [".", "sys"]
 [dependencies]
 libc = "0.2"
 bitflags = "1"
-lazy_static = "1.1"
 glib = "0.9.0"
 gio = "0.8.0"
 glib-sys = "0.9.1"
 gobject-sys = "0.9.1"
 gio-sys = "0.9.1"
+once_cell = "1.0"
 ostree-sys = { version = "0.5.4", path = "sys" }
 
 [dev-dependencies]

rust-bindings/rust/src/lib.rs

@@ -16,8 +16,7 @@ extern crate gio;
 extern crate libc;
 #[macro_use]
 extern crate bitflags;
-#[macro_use]
-extern crate lazy_static;
+extern crate once_cell;
 
 // code generated by gir
 #[rustfmt::skip]