Update dependency Flask-Cors to v3.0.9

[mend-for-github-com]

This PR contains the following updates:

Package	Update	Change
Flask-Cors	patch	==3.0.7 -> ==3.0.9

By merging this PR, the below issues will be automatically resolved and closed:

Severity	CVSS Score	CVE	GitHub Issue
High	7.5	CVE-2020-25032	#55

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Release Notes

corydolphin/flask-cors

v3.0.9

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Security

• Escape path before evaluating resource rules (thanks to Colby Morgan). Prior to this, flask-cors incorrectly
  evaluated CORS resource matching before path expansion. E.g. "/api/../foo.txt" would incorrectly match resources for
  "/api/*" whereas the path actually expands simply to "/foo.txt"

v3.0.8

Compare Source

Fixes : DeprecationWarning: Using or importing the ABCs from 'collections' in Python 3.7.
Thank you @​juanmaneo and @​jdevera for the contribution.

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