v10.3.0 "Chester"

• Dropping support for Node 6.
• Better .eslintrc.js config
• Extensive Drupal theme preprocessing includes. See particle.theme
• Beginning of the ParticleTools PHP namespace and helper. Docs here
• Wrapping Drupal layouts templates regions in proper attributes
• Twig lint now only prints errors
• All NPM dependencies updated since December
• Sass formatting
• Revamped all Vue tests to use updated vue testing tools
• Reformatted all Vue <template> blocks using new Vue prettier config
• Ensure pl-paths.js ignores protons and SVG icons for cleaner pa11y and Backstop testing
• pa11y config is updated to slight more relaxed standards
• OTF fonts are now understood by webpack