Set rust-version to 1.61

Author: algesten

Cargo.toml

@@ -10,6 +10,10 @@ keywords = ["web", "request", "https", "http", "client"]
 categories = ["web-programming::http-client"]
 edition = "2018"
 
+
+# MSRV
+rust-version = "1.61"
+
 [package.metadata.docs.rs]
 features = ["tls", "native-tls", "json", "charset", "cookies", "socks-proxy", "gzip", "brotli", "http-interop"]
 rustdoc-args = ["--cfg", "docsrs"]