enfore unix line endings and always ending files with line endings (#1997)

Signed-off-by: Sebastian Malton <sebastian@malton.name>

src/renderer/components/checkbox/checkbox.tsx

@@ -50,4 +50,4 @@ export class Checkbox extends React.PureComponent<CheckboxProps> {
       </label>
     );
   }
-}
+}

src/renderer/components/checkbox/index.ts

@@ -1 +1 @@
-export * from "./checkbox";
+export * from "./checkbox";