Provide .method() and .query_params()

src/test/simple.rs

@@ -136,7 +136,7 @@ fn request_debug() {
 
     assert_eq!(
         s,
-        "Request(GET http://localhost/my/page [], [Authorization: abcdef, \
+        "Request(GET http://localhost/my/page, [Authorization: abcdef, \
          Content-Length: 1234, Content-Type: application/json])"
     );
 
@@ -148,7 +148,7 @@ fn request_debug() {
 
     assert_eq!(
         s,
-        "Request(GET http://localhost/my/page?q=z [(\"foo\", \"bar baz\")], [Authorization: abcdef])"
+        "Request(GET http://localhost/my/page?q=z&foo=bar+baz, [Authorization: abcdef])"
     );
 }