The nullish coalescing operator ?? allows providing a default value when dealing with null or undefined. It
only coalesces when the original value is null or undefined. Therefore, it is safer and shorter than relying upon chaining
logical || expressions or testing against null or undefined explicitly.
This rule reports when disjunctions (||) and conditionals (?) can be safely replaced with coalescing
(??).
The TSConfig needs to set strictNullChecks to true for the rule to work properly.
