Release jobslot v0.2.15 (#61)

Signed-off-by: Jiahao XU <Jiahao_XU@outlook.com>

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "jobslot"
-version = "0.2.14"
+version = "0.2.15"
 authors = ["Jiahao XU <Jiahao_XU@outlook.com>", "Alex Crichton <alex@alexcrichton.com>"]
 license = "MIT/Apache-2.0"
 repository = "https://github.com/cargo-bins/jobslot"
@@ -28,7 +28,7 @@ tokio = { version = "1", default-features = false, features = ["process"], optio
 scopeguard = "1.1.0"
 
 [target.'cfg(any(unix, windows))'.dependencies]
-# Features: 
+# Features:
 #  - std: Implement std-only traits for getrandom::Error
 #  - rdrand: Enable fallback RDRAND-based implementation on x86/x86_64
 getrandom = { version = "0.2.7", features = ["std", "rdrand"] }