update README

Author: methane

DEVELOP.md

@@ -7,3 +7,19 @@ Wheels for macOS and Linux are built on Travis and AppVeyr, in
 
 Wheels for Windows are built on Github Actions in this repository.
 
+
+### Build
+
+```
+$ make cython
+```
+
+
+### Test
+
+MessagePack uses `pytest` for testing.
+Run test with following command:
+
+```
+$ make test
+```

README.md

@@ -270,15 +270,3 @@ You can use `gc.disable()` when unpacking large message.
 List is the default sequence type of Python.
 But tuple is lighter than list.
 You can use `use_list=False` while unpacking when performance is important.
-
-
-## Development
-
-### Test
-
-MessagePack uses `pytest` for testing.
-Run test with following command:
-
-```
-    $ make test
-```