fix: remove requirement to include @returns in jsdoc
fix: remove requirement to include @returns in jsdoc

This PR only removes the requirement when the function doesn't actually return  like when using callbacks.
 
check this https://eslint.org/docs/rules/valid-jsdoc#options

option description
```
"requireReturn" requires a return tag:
true (default) even if the function or method does not have a return statement (this option value does not apply to constructors)
false if and only if the function or method has a return statement or returns a value e.g. async function (this option value does apply to constructors)
```
dignifiedquire/aegir