Itfit

What's Changed
* 33 add filters for data selection by QuanticPony in https://github.com/QuanticPony/itfit/pull/39
* 17 add interval of confidence to the functions and the plot by Sir-Bip-Bop in https://github.com/QuanticPony/itfit/pull/41


**Full Changelog**: https://github.com/QuanticPony/itfit/compare/0.0.19...0.1.0

What's Changed
* 35 fit selector by QuanticPony in https://github.com/QuanticPony/itfit/pull/37
* 32 add support for y error in data by QuanticPony in https://github.com/QuanticPony/itfit/pull/36


**Full Changelog**: https://github.com/QuanticPony/itfit/compare/0.0.17...0.0.19