chore: remove request dev dependency

[brobro10000]

Removes the request package from dev dependency which should resolve the following dependabot vulnerability alerts:

• https://github.com/openedx/frontend-app-support-tools/security/dependabot/82
• https://github.com/openedx/frontend-app-support-tools/security/dependabot/86

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.71%. Comparing base (00a6bf9) to head (b79e020).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #400   +/-   ##
=======================================
  Coverage   84.71%   84.71%           
=======================================
  Files         174      174           
  Lines        3645     3645           
  Branches      881      880    -1     
=======================================
  Hits         3088     3088           
  Misses        543      543           
  Partials       14       14           

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[adamstankiewicz]

LGTM; this one was a tough-cookie 🍪 😜