Setup: Revision - Update lint rules (#7)

Update some lint rules, including:
* change max line length from 79 to 120, following [pytorch]
* add dedent_closing_brackets in yapf
* remove typed def requirements in mypy

Fix return code bug in setup.py, when lint/test command return 1,
`os.system` will return 256 and `sys.exit(256)` will get return code 0.

[pytorch]: https://github.com/pytorch/pytorch/blob/d1dcd5f/.flake8#L3

.editorconfig

@@ -9,7 +9,7 @@ trim_trailing_whitespace = true
 insert_final_newline = true
 
 [*.py]
-max_line_length = 79
+max_line_length = 120
 
 [*.yaml]
 indent_size = 2

.flake8

 [flake8]
+max-complexity = 10
+max-line-length = 120
+# flake8-docstrings extension
 inline-quotes = single
 multiline-quotes = double
 docstring-quotes = double
 docstring-convention = google
-max-complexity = 10

.mypy.ini

 [mypy]
 ignore_missing_imports = True
 scripts_are_modules = True
-
-[superbench]
 warn_return_any = True
-disallow_untyped_defs = True

.style.yapf

 [style]
 based_on_style = pep8
+column_limit = 120
 spaces_before_comment = 4
 blank_line_before_module_docstring = True
+dedent_closing_brackets = True

setup.py

@@ -41,9 +41,8 @@ def finalize_options(self):
 
     def run(self):
         """Fromat the code using yapf."""
-        errno = os.system(
-            'python3 -m yapf --in-place --recursive --exclude .git .')
-        sys.exit(errno)
+        errno = os.system('python3 -m yapf --in-place --recursive --exclude .git .')
+        sys.exit(0 if errno == 0 else 1)
 
 
 class Linter(Command):
@@ -67,12 +66,16 @@ def finalize_options(self):
 
     def run(self):
         """Lint the code with yapf, mypy, and flake8."""
-        errno = os.system(' && '.join([
-            'python3 -m yapf --diff --recursive --exclude .git .',
-            'python3 -m mypy .',
-            'python3 -m flake8',
-        ]))
-        sys.exit(errno)
+        errno = os.system(
+            ' && '.join(
+                [
+                    'python3 -m yapf --diff --recursive --exclude .git .',
+                    'python3 -m mypy .',
+                    'python3 -m flake8',
+                ]
+            )
+        )
+        sys.exit(0 if errno == 0 else 1)
 
 
 class Tester(Command):
@@ -97,7 +100,7 @@ def finalize_options(self):
     def run(self):
         """Run pytest."""
         errno = os.system('python3 -m pytest -v')
-        sys.exit(errno)
+        sys.exit(0 if errno == 0 else 1)
 
 
 setup(