BREAKING CHANGE:
Before this change, the filter assumed that the input (if not undefined/null) was of type 'string'
and that certain methods (such as `.match()`) would be available on it. Passing a non-string value
would most likely result in a not-very-useful error being thrown (trying to call a method that does
not exist) or in unexpected behavior (if the input happened to have the assumed methods).
After this change, a proper (informative) error will be thrown. If you want to pass non-string
values through `linky`, you need to explicitly convert them to strings first.
Since input values could be initialized asynchronously, `undefined` or `null` will still be
returned unchanged (without throwing an error).
Closes#13547Closes#13693
Georgios Kalpakas
98c2db7f9c