fix wrong method in POST

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "digest_auth"
-version = "0.1.2"
+version = "0.1.3"
 authors = ["Ondřej Hruška <ondra@ondrovo.com>"]
 edition = "2018"
 description = "Implementation of the Digest Auth algorithm as defined in IETF RFC 2069, 2617, and 7616, intended for HTTP clients"

src/digest.rs

@@ -250,7 +250,7 @@ impl<'a> AuthContext<'a> {
         uri : &'u str,
         body : Option<&'b [u8]>
     ) -> Self {
-        Self::new_with_method(username, password, uri, body, HttpMethod::GET)
+        Self::new_with_method(username, password, uri, body, HttpMethod::POST)
     }
 
     /// Construct a new context with arbitrary verb and, optionally, a payload body