Use black for code formatting and format the code

Merge #65

django_etebase/drf_msgpack/apps.py

@@ -2,4 +2,4 @@ from django.apps import AppConfig
 
 
 class DrfMsgpackConfig(AppConfig):
-    name = 'drf_msgpack'
+    name = "drf_msgpack"

django_etebase/drf_msgpack/parsers.py

@@ -5,10 +5,10 @@ from rest_framework.exceptions import ParseError
 
 
 class MessagePackParser(BaseParser):
-    media_type = 'application/msgpack'
+    media_type = "application/msgpack"
 
     def parse(self, stream, media_type=None, parser_context=None):
         try:
             return msgpack.unpackb(stream.read(), raw=False)
         except Exception as exc:
-            raise ParseError('MessagePack parse error - %s' % str(exc))
+            raise ParseError("MessagePack parse error - %s" % str(exc))

django_etebase/drf_msgpack/renderers.py

@@ -4,12 +4,12 @@ from rest_framework.renderers import BaseRenderer
 
 
 class MessagePackRenderer(BaseRenderer):
-    media_type = 'application/msgpack'
-    format = 'msgpack'
-    render_style = 'binary'
+    media_type = "application/msgpack"
+    format = "msgpack"
+    render_style = "binary"
     charset = None
 
     def render(self, data, media_type=None, renderer_context=None):
         if data is None:
-            return b''
+            return b""
         return msgpack.packb(data, use_bin_type=True)