Fix errors in TypeScript definitions

[danrashid]

Fixes the following errors with TypeScript 2.3.2:

Failed to compile.

Error in [...]\node_modules\semantic-ui-react\dist\commonjs\views\Statistic\StatisticGroup.d.ts
(4,35): error TS2307: Cannot find module './Statictic'.

Error in [...]\node_modules\semantic-ui-react\dist\commonjs\collections\Form\FormCheckbox.d.ts
(6,18): error TS2320: Interface 'FormCheckboxProps' cannot simultaneously extend types 'FormFieldProps' and 'CheckboxProps'.
  Named property 'type' of types 'FormFieldProps' and 'CheckboxProps' are not identical.

Error in [...]\node_modules\semantic-ui-react\dist\commonjs\collections\Form\FormRadio.d.ts
(6,18): error TS2320: Interface 'FormRadioProps' cannot simultaneously extend types 'FormFieldProps' and 'RadioProps'.
  Named property 'type' of types 'FormFieldProps' and 'RadioProps' are not identical.

[layershifter]

Dupe, #1624 and #1625