fix linting

Author: T4rk1n

.flake8

@@ -1,6 +1,7 @@
 [flake8]
 ignore = C901, E203, E266, E501, E731, W503
 select = B,C,E,F,W,T4
+exclude = node_modules,metadata_test.py
 per-file-ignores =
     tests/*: E722, F811
     dash/html/I.py: E742

.pylintrc

@@ -17,7 +17,8 @@ ignore-patterns=
 # The regex matches against paths.
 ignore-paths=^dash/dcc/.*$,
              ^dash/html/.*$,
-             ^dash/dash_table/.*$
+             ^dash/dash_table/.*$,
+             ^.*/node_modules/.*$
 
 # Python code to execute, usually for sys.path manipulation such as
 # pygtk.require().

package.json

@@ -13,7 +13,7 @@
     "private::build.renderer": "cd dash/dash-renderer && rimraf build/dash_renderer.min.js && renderer build && sh renderer-test.sh",
     "private::build.jupyterlab": "cd @plotly/dash-jupyterlab && jlpm install && jlpm build:pack",
     "private::lint.black": "black dash tests --exclude metadata_test.py --check",
-    "private::lint.flake8": "flake8 --exclude=metadata_test.py dash tests",
+    "private::lint.flake8": "flake8 dash tests",
     "private::lint.pylint-dash": "pylint dash setup.py --rcfile=.pylintrc",
     "private::lint.pylint-tests": "pylint tests/unit tests/integration -d all -e C0410,C0413,W0109 --rcfile=.pylintrc",
     "private::lint.renderer": "cd dash/dash-renderer && npm run lint",