RDM-5301 - yarn audit with suppression script

[smathangi]

yarnpkg/yarn#6669

JIRA link (if applicable)

https://tools.hmcts.net/jira/browse/RDM-5301

Change description

yarnpkg/yarn#6669

Does this PR introduce a breaking change? (check one with "x")

[ ] Yes
[ x] No

[codecov]

Codecov Report

Merging #234 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #234   +/-   ##
=======================================
  Coverage   87.41%   87.41%           
=======================================
  Files          14       14           
  Lines         286      286           
  Branches       39       39           
=======================================
  Hits          250      250           
  Misses         36       36

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