Handler is called for error case which seems incorrect as for me
1) handler usually expecting to get completely valid object, while it might be null or something invalid
2) usually it will break the code and original io-ts will be lost with catched 'Handler side error, details' error
https://github.com/YBogomolov/fetcher-ts/blob/develop/src/fetcher.ts#L167
Handler is called for error case which seems incorrect as for me 1) handler usually expecting to get completely valid object, while it might be null or something invalid 2) usually it will break the code and original io-ts will be lost with catched 'Handler side error, details' error