Make Plex Scanner.read method public

--HG--
extra : transplant_source : %7B%A1n%8F%25%8E%DE%EE%CCQu%8B1%9Ea%B7%3B%19MF

Cython/Plex/Scanners.pxd

@@ -31,7 +31,7 @@ cdef class Scanner:
     @cython.locals(input_state=long)
     cdef next_char(self)
     @cython.locals(action=Action)
-    cdef tuple read(self)
+    cpdef tuple read(self)
     cdef tuple scan_a_token(self)
     cdef tuple position(self)