feat: add userEvent.tripleClick API

tests/click/tripleClick.ts

@@ -0,0 +1,14 @@
+import userEvent from '#src'
+import { getUISelection } from '#src/document'
+import { setup } from '#testHelpers/utils'
+
+test('select input per triple click', () => {
+    const { element, getEventSnapshot} = setup<HTMLInputElement>(`<input value="foo bar"/>`)
+
+    userEvent.tripleClick(element)
+
+    expect(element).toHaveFocus()
+    expect(getUISelection(element)).toEqual({selectionStart: 0, selectionEnd: 7})
+
+    expect(getEventSnapshot()).toMatchInlineSnapshot()
+})