missed a dictionary reference in the readme

Author: Anthchirp

README.rst

@@ -43,17 +43,17 @@ Features
 * runs an external process and waits for it to finish
 * does not deadlock, no matter the process stdout/stderr output behaviour
 * returns the exit code, stdout, stderr (separately, both as bytestrings),
-  and the total process runtime as a dictionary
+  as a subprocess.CompletedProcess object
 * process can run in a custom environment, either as a modification of
   the current environment or in a new environment from scratch
-* stdin can be fed to the process, the returned dictionary contains
-  information how much was read by the process
+* stdin can be fed to the process
 * stdout and stderr is printed by default, can be disabled
 * stdout and stderr can be passed to any arbitrary function for
   live processing (separately, both as unicode strings)
 * optionally enforces a time limit on the process, raising a
   subprocess.TimeoutExpired exception if it is exceeded.
 
+
 Credits
 -------