Make cookies an optional feature (default off)

Cargo.toml

@@ -10,6 +10,7 @@ readme = "README.md"
 license = "MIT/Apache-2.0"
 categories = ["web-programming::http-client"]
 edition = "2018"
+autotests = true
 
 publish = false
 
@@ -38,8 +39,7 @@ time = "0.1.42"
 # TODO: candidates for optional features
 
 async-compression = { version = "0.1.0-alpha.4", default-features = false, features = ["gzip", "stream"] }
-cookie_store = "0.9.0"
-cookie = "0.12.0"
+
 serde = "1.0"
 serde_json = "1.0"
 serde_urlencoded = "0.6.1"
@@ -57,6 +57,10 @@ rustls = { version = "0.16", features = ["dangerous_configuration"], optional =
 tokio-rustls = { version = "=0.12.0-alpha.2", optional = true }
 webpki-roots = { version = "0.17", optional = true }
 
+## cookies
+cookie_crate = { version = "0.12", package = "cookie", optional = true }
+cookie_store = { version = "0.9", optional = true }
+
 ## socks
 #socks = { version = "0.3.2", optional = true }
 
@@ -81,7 +85,15 @@ default-tls-vendored = ["default-tls", "native-tls/vendored"]
 
 rustls-tls = ["hyper-rustls", "tokio-rustls", "webpki-roots", "rustls", "tls"]
 
+cookies = ["cookie_crate", "cookie_store"]
+
 #trust-dns = ["trust-dns-resolver"]
 
 [target.'cfg(windows)'.dependencies]
 winreg = "0.6"
+
+[[test]]
+name = "cookie"
+path = "tests/cookie.rs"
+required-features = ["cookies"]
+