Applying black formatting

- Fixing flake8 configuration to agree with black
- Adding black validation check to github actions

scripts/capnp-json.py

@@ -11,7 +11,12 @@ def parse_args():
     parser.add_argument("command")
     parser.add_argument("schema_file")
     parser.add_argument("struct_name")
-    parser.add_argument("-d", "--defaults", help="include default values in json output", action="store_true")
+    parser.add_argument(
+        "-d",
+        "--defaults",
+        help="include default values in json output",
+        action="store_true",
+    )
 
     return parser.parse_args()
 
@@ -41,9 +46,11 @@ def main():
 
     command = args.command
     kwargs = vars(args)
-    del kwargs['command']
+    del kwargs["command"]
 
-    globals()[command](**kwargs)  # hacky way to get defined functions, and call function with name=command
+    globals()[command](
+        **kwargs
+    )  # hacky way to get defined functions, and call function with name=command
 
 
 main()

scripts/capnp_test_pycapnp.py

@@ -3,7 +3,10 @@ import os
 import sys
 
 import capnp
-capnp.add_import_hook([os.getcwd(), "/usr/local/include/"])  # change this to be auto-detected?
+
+capnp.add_import_hook(
+    [os.getcwd(), "/usr/local/include/"]
+)  # change this to be auto-detected?
 
 import test_capnp  # noqa: E402
 
@@ -20,7 +23,7 @@ def encode(name):
     print(message.to_bytes())
 
 
-if sys.argv[1] == 'decode':
+if sys.argv[1] == "decode":
     decode(sys.argv[2])
 else:
     encode(sys.argv[2])