Specify required rust version

HEnquist · HEnquist · commit 6be62cf79728 · 2022-03-28T22:07:34.000+02:00
diff --git a/Cargo.toml b/Cargo.toml
@@ -1,7 +1,8 @@
 [package]
 name = "wasapi"
 version = "0.12.0"
-edition = "2018"
+edition = "2021"
+rust-version = "1.59"
 authors = ["HEnquist <henrik.enquist@gmail.com>"]
 description = "Bindings for the Wasapi API on Windows"
 license = "MIT"
