Revert file move

Put `index.ts` back to `lib` for a simpler npmignore.

.npmignore

@@ -16,5 +16,4 @@ rollup.config.js
 tsconfig.json
 yarn.lock
 **/*.test.d.ts
-index.ts
-
+*.log

index.ts

@@ -1,17 +0,0 @@
-import Button from './lib/components/Button/Button'
-import Checkbox from './lib/components/Checkbox/Checkbox'
-import Icon from './lib/components/Icon/Icon'
-import RadioButton from './lib/components/RadioButton/RadioButton'
-import Select from './lib/components/Select/Select'
-import Slider from './lib/components/Slider/Slider'
-import TextInput from './lib/components/TextInput/TextInput'
-
-export {
-  Button,
-  Checkbox,
-  Icon,
-  RadioButton,
-  Select,
-  Slider,
-  TextInput,
-}

lib/index.ts

@@ -0,0 +1,17 @@
+import Button from './components/Button/Button'
+import Checkbox from './components/Checkbox/Checkbox'
+import Icon from './components/Icon/Icon'
+import RadioButton from './components/RadioButton/RadioButton'
+import Select from './components/Select/Select'
+import Slider from './components/Slider/Slider'
+import TextInput from './components/TextInput/TextInput'
+
+export {
+  Button,
+  Checkbox,
+  Icon,
+  RadioButton,
+  Select,
+  Slider,
+  TextInput,
+}