Fix Safe Navigation issue

[mojosoeun]

What this PR does / why we need it?

Fix Safe Navigation issue

Change target from 'esnext' to 'es2019'

Any background context you want to provide?

kulshekhar/ts-jest#1283

kulshekhar/ts-jest#1283 (comment)

https://stackoverflow.com/questions/58725711/how-to-get-optional-chaining-working-in-typescript

Optional chaining was added in ES2020, which isn't supported by node yet. So if your 'target' compile option is ES2020 or ESNext, then typescript compiler will see an optional chaining operator and leave it alone. If your target is ES2019 or further back then typescript will transpile the feature into something that ndoe will understand .

What are the relevant tickets?

Fixes #197

Checklist

• Added relevant tests or not required
• Didn't break anything

[codecov]

Codecov Report

Merging #217 (e0cba87) into main (4c9e016) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #217   +/-   ##
=======================================
  Coverage   79.68%   79.68%           
=======================================
  Files          49       49           
  Lines        2820     2820           
  Branches      469      469           
=======================================
  Hits         2247     2247           
  Misses        404      404           
  Partials      169      169           

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[ppeeou]

LGTM

[dc7303]

LGTM.