fix(switch): #197 Add missing 'disabled' attribute

Author: esuau

src/switch/switch.stories.ts

@@ -12,7 +12,7 @@ storiesOf("Switch", module).addDecorator(
 	.add("Basic", () => ({
 		template: `
 		<ibm-switch [disabled]="disabled"></ibm-switch>
-		<ibm-switch [size]="'sm'"></ibm-switch>
+		<ibm-switch [disabled]="disabled" [size]="'sm'"></ibm-switch>
 		`,
 		props: {
 			disabled: boolean("disabled", false)