Add another test case

test/validator/samples/a11y-label-has-associated-control/input.svelte

@@ -1,3 +1,7 @@
+<script>
+  import LabelComponent from './label.svelte'
+</script>
+
 <label>A</label>
 <label for="id">B</label>
 
@@ -5,3 +9,4 @@
 <label>D <button>D</button></label>
 <label>E <span></span></label>
 <label>F {#if true}<input type="text" />{/if}</label>
+<LabelComponent>G <input type="text" /></LabelComponent>

test/validator/samples/a11y-label-has-associated-control/label.svelte

@@ -0,0 +1,3 @@
+<label>
+  <slot />
+</label>