1.14.0

Major improvements

• Add Babel to the webpack build

Minor improvements

• Add apply tag (#656 by @maxhelias)
• Add spaceless filter (#655 by @maxhelias)
• Add deprecated tag (#675 by @josephineb)
• Fix starts with and ends with expressions (#661 by @ilkkave)
• Add package.json license field to fix npm warning (#672 by @WietseWind)
• Update strict_variables option to match Twig's strict messages (#674 by @toptalo)
• Fix ?? operator when used with arrays to return the array rather than its length (#653 by @diegorales)