Declaration ViewsAutocompleteFiltersTrait::valueForm must be compatible with SearchApiNumeric::valueForm

@Emircan Erkul thanks for the issue and patch

2 things

1. 8.1.x is not maintained anymore, you should use/update to 2.0.x
2. Only MRs will be considered, as now we have the gitlab CI
So could you, please, open a MR for 2.0.x ... you could also include other returns types, for the other methods ...

thank you

Emircan Erkul → changed the visibility of the branch compatibility-fix--2.0.x to hidden.

@vasike included as MR from 2.0.x. I only included valueForm function's return type because this one only causing the problem.