[Snyk] Fix for 11 vulnerabilities

[snyk-bot]

Snyk has created this PR to fix one or more vulnerable packages in the `pip` dependencies of this project.

Changes included in this PR

• Changes to the following files to upgrade the vulnerable dependencies to a fixed version:
  • requirements.txt

⚠️ Warning

wagtail 2.10.2 requires tablib, which is not installed.
wagtail 2.10.2 requires django-taggit, which is not installed.
wagtail 2.10.2 requires django-modelcluster, which is not installed.
wagtail 2.10.2 requires django-filter, which is not installed.
wagtail 2.10.2 requires djangorestframework, which is not installed.
wagtail 2.10.2 has requirement Django<3.2,>=2.2, but you have Django 1.11.29.

Vulnerabilities that will be fixed

By pinning:

Severity	Priority Score (*)	Issue	Upgrade	Breaking Change	Exploit Maturity
	651/1000 Why? Proof of Concept exploit, Has a fix available, CVSS 6.6	Stored Command Injection SNYK-PYTHON-CELERY-2314953	celery: 4.4.2 -> 5.2.2	No	Proof of Concept
	399/1000 Why? Has a fix available, CVSS 3.7	Directory Traversal SNYK-PYTHON-DJANGO-2329158	django: 3.1.14 -> 3.2.12	No	No Known Exploit
	399/1000 Why? Has a fix available, CVSS 3.7	Information Exposure SNYK-PYTHON-DJANGO-2329159	django: 3.1.14 -> 3.2.12	No	No Known Exploit
	479/1000 Why? Has a fix available, CVSS 5.3	Denial of Service (DoS) SNYK-PYTHON-DJANGO-2329160	django: 3.1.14 -> 3.2.12	No	No Known Exploit
	496/1000 Why? Recently disclosed, Has a fix available, CVSS 4.2	Cross-site Scripting (XSS) SNYK-PYTHON-DJANGO-2389002	django: 3.1.14 -> 3.2.12	No	No Known Exploit
	551/1000 Why? Recently disclosed, Has a fix available, CVSS 5.3	Denial of Service (DoS) SNYK-PYTHON-DJANGO-2389021	django: 3.1.14 -> 3.2.12	No	No Known Exploit
	509/1000 Why? Has a fix available, CVSS 5.9	Denial of Service (DoS) SNYK-PYTHON-PILLOW-2329135	pillow: 8.4.0 -> 9.0.0	No	No Known Exploit
	704/1000 Why? Has a fix available, CVSS 9.8	Arbitrary Code Execution SNYK-PYTHON-PILLOW-2331901	pillow: 8.4.0 -> 9.0.0	No	No Known Exploit
	539/1000 Why? Has a fix available, CVSS 6.5	Buffer Over-read SNYK-PYTHON-PILLOW-2331905	pillow: 8.4.0 -> 9.0.0	No	No Known Exploit
	479/1000 Why? Has a fix available, CVSS 5.3	Improper Initialization SNYK-PYTHON-PILLOW-2331907	pillow: 8.4.0 -> 9.0.0	No	No Known Exploit
	461/1000 Why? Recently disclosed, Has a fix available, CVSS 3.5	Information Exposure SNYK-PYTHON-WAGTAIL-2342656	wagtail: 2.12.5 -> 2.15.2	No	No Known Exploit

(*) Note that the real score may have changed since the PR was raised.

Some vulnerabilities couldn't be fully fixed and so Snyk will still find them when the project is tested again. This may be because the vulnerability existed within more than one direct dependency, but not all of the effected dependencies could be upgraded.

Check the changes in this PR to ensure they won't cause issues with your project.

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