Upgrade symfony packages

[ankitpokhrel]

See:

• GHSA-x92h-wmg2-6hp7
• GHSA-xhh6-956q-4q69

[codecov]

Codecov Report

Merging #217 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             master   #217   +/-   ##
=======================================
  Coverage       100%   100%           
  Complexity      350    350           
=======================================
  Files            20     20           
  Lines           933    933           
=======================================
  Hits            933    933

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