fix(ionic): add alternative way to specify min/max date (#2677)
fix(ionic): add alternative way to specify min/max date (#2677)

fix #2666
ngx-formly/ngx-formly,ngx-formly/ngx-formly,formly-js/ng-formly,ngx-formly/ngx-formly,formly-js/ng-formly,ngx-formly/ngx-formly