chore: upgrade MSRV & dependencies (#26)

libc v0.2.167 needs at least Rust 1.63, hence bump the MSRV.

Also take the chance and update the dependencies.

.github/workflows/build.yml

@@ -3,7 +3,7 @@ name: build
 on: [push, pull_request]
 
 env:
-  MSRV: 1.62.1
+  MSRV: 1.63.0
 
 jobs:
   msrv:

Cargo.toml

@@ -7,15 +7,15 @@ repository = "https://github.com/vmx/temp-env"
 description = "Set environment variables temporarily."
 keywords = ["env", "environment", "envvar", "temporary", "testing"]
 categories = ["development-tools", "development-tools::testing"]
-edition = "2018"
-rust-version = "1.62.1"
+edition = "2021"
+rust-version = "1.63.0"
 
 [dependencies]
-futures = { version = "0.3.21", optional = true }
-parking_lot = "0.12.1"
+futures = { version = "0.3.31", optional = true }
+parking_lot = { version = "0.12.3" }
 
 [dev-dependencies]
-tokio = { version = "1.21.1", features = ["full"]}
+tokio = { version = "1.38.1", features = ["full"]}
 
 [features]
 default = []

src/lib.rs

@@ -107,7 +107,7 @@ impl<'a> RestoreEnv<'a> {
     }
 }
 
-impl<'a> Drop for RestoreEnv<'a> {
+impl Drop for RestoreEnv<'_> {
     fn drop(&mut self) {
         for (var, value) in self.env.iter() {
             update_env(var, value.as_ref().map(|v| v.as_os_str()));
@@ -191,7 +191,8 @@ where
 ///     let v = std::env::var("MY_VAR").unwrap();
 ///     assert_eq!(v, "ok".to_owned());
 /// }
-
+///
+/// #[cfg(feature = "async_closure")]
 /// #[tokio::test]
 /// async fn test_async_closure() {
 ///     crate::async_with_vars([("MY_VAR", Some("ok"))], check_var());
@@ -546,7 +547,7 @@ mod tests {
 
     #[cfg(feature = "async_closure")]
     async fn check_var() {
-        let v = std::env::var("MY_VAR").unwrap();
+        let v = env::var("MY_VAR").unwrap();
         assert_eq!(v, "ok".to_owned());
     }
 
@@ -555,7 +556,7 @@ mod tests {
     async fn test_async_closure() {
         crate::async_with_vars([("MY_VAR", Some("ok"))], check_var()).await;
         let f = async {
-            let v = std::env::var("MY_VAR").unwrap();
+            let v = env::var("MY_VAR").unwrap();
             assert_eq!(v, "ok".to_owned());
         };
         crate::async_with_vars([("MY_VAR", Some("ok"))], f).await;
@@ -566,7 +567,7 @@ mod tests {
     async fn test_async_closure_calls_closure() {
         let (tx, rx) = tokio::sync::oneshot::channel();
         let f = async {
-            tx.send(std::env::var("MY_VAR")).unwrap();
+            tx.send(env::var("MY_VAR")).unwrap();
         };
         crate::async_with_vars([("MY_VAR", Some("ok"))], f).await;
         let value = rx.await.unwrap().unwrap();