Add support for "today" when using date filter

[pdehaan]

liquidjs @ v9.7.0

Per https://shopify.github.io/liquid/filters/date/

To get the current time, pass the special word "now" (or "today") to date:

Looks like the "now" case works w/ liquidjs, but not the "today" keyword.

liquidjs/test/integration/builtin/filters/date.ts

Lines 14 to 16 in 31bec7e

	it('should create a new Date when given "now"', function () {
	return test('{{ "now" | date: "%Y"}}', (new Date()).getFullYear().toString())
	})

const assert = require("assert");

const pkg = require("liquidjs/package.json");
const { Liquid } = require('liquidjs');
const engine = new Liquid({
  strictFilters: true
});

main()
  .catch(err => {
    console.error(err.message);
    process.exit(2);
  });

async function main() {
  console.log(`${pkg.name} @ v${pkg.version}`); // liquidjs @ v9.7.0

  const article = {article:{published_at: new Date(2015, 6, 17)}};

  const ex1 = await engine.parseAndRender(`{{ article.published_at | date: "%a, %b %d, %y" }}`, article);
  assert.strictEqual(ex1, "Fri, Jul 17, 15");

  const ex2 = await engine.parseAndRender(`{{ article.published_at | date: "%Y" }}`, article);
  assert.strictEqual(ex2, "2015");

  const ex3 = await engine.parseAndRender(`{{ "March 14, 2016" | date: "%b %d, %y" }}`);
  assert.strictEqual(ex3, "Mar 14, 16");

  const ex4 = await engine.parseAndRender(`{{ "now" | date: "%Y-%m-%d %H:%M" }}`);
  assert.notStrictEqual(ex4, "now");

  const ex5 = await engine.parseAndRender(`{{ "today" | date: "%Y-%m-%d %H:%M" }}`);
  assert.strictEqual(ex4, ex5);
  assert.notStrictEqual(ex5, "today");

  console.log("SUCCESS!");
}

OUTPUT

Expected values to be strictly equal:
+ actual
- expected

+ '2020-02-18 14:51'
- 'today'

[harttle]

🎉 This issue has been resolved in version 9.8.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀