fix: recover stored value on init

[jorgecasar]

Closes #25

[43081j]

had a long think about it because i wasn't sure if it makes more sense in hostConnected, but i think you're right putting it in the constructor actually

could you also add a test?

basically similar to this suite:

relit/src/test/controllers/localStorage_test.ts

Lines 88 to 105 in 326ddeb

	suite('with default value', () => {
	setup(async () => {
	element = document.createElement('test-element') as TestElement;
	controller = new LocalStorageController(element, 'test-key', [5, 6]);
	element.controllers.push(controller);
	element.template = () => html`${JSON.stringify(controller.value)}`;
	document.body.appendChild(element);
	await element.updateComplete;
	});
	test('initialises to default value', () => {
	const storageValue = window.localStorage.getItem('test-key');
	assert.equal(controller.value, [5, 6]);
	assert.equal(element.shadowRoot!.textContent, '[5,6]');
	assert.is(storageValue, '[5,6]');
	});
	});

it belongs in its own describe like that since you want to set test-key in your beforeEach (directly in local storage)

almost the same test, just don't pass a default. although it may be worth doing another where you do pass a default, and assert it uses the one from storage rather than the default

[43081j]

looks good to me!

do love a PR which has more tests than code 😂 they will help out a lot though