[Snyk] Security upgrade djangorestframework from 3.0.0 to 3.15.2

[enterstudio]

This PR was automatically created by Snyk using the credentials of a real user.


Snyk has created this PR to fix 1 vulnerabilities in the pip dependencies of this project.

Snyk changed the following file(s):

• requirements.txt

⚠️ Warning

``` django-keen 0.1.3 has requirement keen==0.3.0, but you have keen 0.3.7.

</details>





---

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[//]: # 'snyk:metadata:{"customTemplate":{"variablesUsed":[],"fieldsUsed":[]},"dependencies":[{"name":"djangorestframework","from":"3.0.0","to":"3.15.2"}],"env":"prod","issuesToFix":[{"exploit_maturity":"Proof of Concept","id":"SNYK-PYTHON-DJANGORESTFRAMEWORK-7252137","priority_score":658,"priority_score_factors":[{"type":"exploit","label":"Proof of Concept","score":107},{"type":"freshness","label":true,"score":71},{"type":"fixability","label":true,"score":214},{"type":"cvssScore","label":"5.3","score":265},{"type":"scoreVersion","label":"v1","score":1}],"severity":"medium","title":"Cross-site Scripting (XSS)"}],"prId":"7074d7b4-990f-48ad-bfec-de1401892733","prPublicId":"7074d7b4-990f-48ad-bfec-de1401892733","packageManager":"pip","priorityScoreList":[658],"projectPublicId":"18313f7e-37f3-4819-a759-7efc8ac6f311","projectUrl":"https://app.snyk.io/org/enterstudio/project/18313f7e-37f3-4819-a759-7efc8ac6f311?utm_source=github&utm_medium=referral&page=fix-pr","prType":"fix","templateFieldSources":{"branchName":"default","commitMessage":"default","description":"default","title":"default"},"templateVariants":["updated-fix-title","pr-warning-shown","priorityScore"],"type":"auto","upgrade":[],"vulns":["SNYK-PYTHON-DJANGORESTFRAMEWORK-7252137"],"patch":[],"isBreakingChange":false,"remediationStrategy":"vuln"}'