Update dependency scipy to v1.4.1

[renovate-bot]

This PR contains the following updates:

Package	Update	Change
scipy	minor	==1.2.0 -> ==1.4.1

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[busunkim96]

Traceback (most recent call last):
  File "/tmpfs/src/github/python-docs-samples/appengine/flexible/scipy/main_test.py", line 32, in test_index
    r = client.get('/')
  File "/tmpfs/src/github/python-docs-samples/appengine/flexible/scipy/.nox/py3-3-7-sample/lib/python3.7/site-packages/werkzeug/test.py", line 1006, in get
    return self.open(*args, **kw)
  File "/tmpfs/src/github/python-docs-samples/appengine/flexible/scipy/.nox/py3-3-7-sample/lib/python3.7/site-packages/flask/testing.py", line 227, in open
    follow_redirects=follow_redirects,
  File "/tmpfs/src/github/python-docs-samples/appengine/flexible/scipy/.nox/py3-3-7-sample/lib/python3.7/site-packages/werkzeug/test.py", line 970, in open
    response = self.run_wsgi_app(environ.copy(), buffered=buffered)
  File "/tmpfs/src/github/python-docs-samples/appengine/flexible/scipy/.nox/py3-3-7-sample/lib/python3.7/site-packages/werkzeug/test.py", line 861, in run_wsgi_app
    rv = run_wsgi_app(self.application, environ, buffered=buffered)
  File "/tmpfs/src/github/python-docs-samples/appengine/flexible/scipy/.nox/py3-3-7-sample/lib/python3.7/site-packages/werkzeug/test.py", line 1096, in run_wsgi_app
    app_rv = app(environ, start_response)
  File "/tmpfs/src/github/python-docs-samples/appengine/flexible/scipy/.nox/py3-3-7-sample/lib/python3.7/site-packages/flask/app.py", line 2463, in __call__
    return self.wsgi_app(environ, start_response)
  File "/tmpfs/src/github/python-docs-samples/appengine/flexible/scipy/.nox/py3-3-7-sample/lib/python3.7/site-packages/flask/app.py", line 2449, in wsgi_app
    response = self.handle_exception(e)
  File "/tmpfs/src/github/python-docs-samples/appengine/flexible/scipy/.nox/py3-3-7-sample/lib/python3.7/site-packages/flask/app.py", line 1866, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "/tmpfs/src/github/python-docs-samples/appengine/flexible/scipy/.nox/py3-3-7-sample/lib/python3.7/site-packages/flask/_compat.py", line 39, in reraise
    raise value
  File "/tmpfs/src/github/python-docs-samples/appengine/flexible/scipy/.nox/py3-3-7-sample/lib/python3.7/site-packages/flask/app.py", line 2446, in wsgi_app
    response = self.full_dispatch_request()
  File "/tmpfs/src/github/python-docs-samples/appengine/flexible/scipy/.nox/py3-3-7-sample/lib/python3.7/site-packages/flask/app.py", line 1951, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/tmpfs/src/github/python-docs-samples/appengine/flexible/scipy/.nox/py3-3-7-sample/lib/python3.7/site-packages/flask/app.py", line 1820, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/tmpfs/src/github/python-docs-samples/appengine/flexible/scipy/.nox/py3-3-7-sample/lib/python3.7/site-packages/flask/_compat.py", line 39, in reraise
    raise value
  File "/tmpfs/src/github/python-docs-samples/appengine/flexible/scipy/.nox/py3-3-7-sample/lib/python3.7/site-packages/flask/app.py", line 1949, in full_dispatch_request
    rv = self.dispatch_request()
  File "/tmpfs/src/github/python-docs-samples/appengine/flexible/scipy/.nox/py3-3-7-sample/lib/python3.7/site-packages/flask/app.py", line 1935, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/tmpfs/src/github/python-docs-samples/appengine/flexible/scipy/main.py", line 29, in resize
    img = scipy.misc.imread(image_path)
AttributeError: module 'scipy.misc' has no attribute 'imread'

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