Add python-engineio to version compatibility table

Author: miguelgrinberg

docs/intro.rst

@@ -31,15 +31,15 @@ The version compatibility chart below maps versions of this package to versions
 of the JavaScript reference implementation and the versions of the Socket.IO and
 Engine.IO protocols.
 
-+------------------------------+-----------------------------+-----------------------------+-------------------------+
-| JavaScript Socket.IO version | Socket.IO protocol revision | Engine.IO protocol revision | python-socketio version |
-+==============================+=============================+=============================+=========================+
-| 0.9.x                        | 1, 2                        | 1, 2                        | Not supported           |
-+------------------------------+-----------------------------+-----------------------------+-------------------------+
-| 1.x and 2.x                  | 3, 4                        | 3                           | 4.x                     |
-+------------------------------+-----------------------------+-----------------------------+-------------------------+
-| 3.x                          | 5                           | 4                           | 5.x                     |
-+------------------------------+-----------------------------+-----------------------------+-------------------------+
++------------------------------+-----------------------------+-----------------------------+-------------------------+-------------------------+
+| JavaScript Socket.IO version | Socket.IO protocol revision | Engine.IO protocol revision | python-socketio version | python-engineio version |
++==============================+=============================+=============================+=========================+=========================+
+| 0.9.x                        | 1, 2                        | 1, 2                        | Not supported           | Not supported           |
++------------------------------+-----------------------------+-----------------------------+-------------------------+-------------------------+
+| 1.x and 2.x                  | 3, 4                        | 3                           | 4.x                     | 3.x                     |
++------------------------------+-----------------------------+-----------------------------+-------------------------+-------------------------+
+| 3.x                          | 5                           | 4                           | 5.x                     | 4.x                     |
++------------------------------+-----------------------------+-----------------------------+-------------------------+-------------------------+
 
 Client Examples
 ---------------