Use AtomicI32 instead of I64 for compatibility with armel (#99)

src/tests.rs

@@ -1,13 +1,13 @@
 mod utils {
 
- use std::sync::atomic::{AtomicI64, Ordering};
+ use std::sync::atomic::{AtomicI32, Ordering};
 
  use once_cell::sync::Lazy;
 
  // WARNING Expecting that `cargo test` won't be invoked on the same computer more than once within
  // a single millisecond
  static INSTANCE_ID: Lazy<i64> = Lazy::new(|| chrono::Local::now().timestamp_millis());
- static ID_OFFSET: AtomicI64 = AtomicI64::new(0);
+ static ID_OFFSET: AtomicI32 = AtomicI32::new(0);
 
  pub fn get_unique_name() -> String {
  let id = ID_OFFSET.fetch_add(1, Ordering::SeqCst);