Update requirements.txt (#346)

huguesb · methane · commit 737f08a885dc · 2019-03-27T22:37:26.000+09:00
bytearray.pxd is only available starting with Cython 0.29
diff --git a/requirements.txt b/requirements.txt
@@ -1 +1 @@
-Cython==0.27.3
+Cython~=0.29.5
