0.4.1

• [63ea244] Lint JS
• [90b8f03] Update dependencies, incl wpdtrt-plugin-boilerplate from 1.7.6 to 1.7.7 to use Composer v1
• [649f551] Hide in print view
• [95422e9] Add polyfills for IE11
• [5acf5b2] Add icons and underlines to anchor list links
• [cc14509] Update wpdtrt-plugin-boilerplate from 1.7.5 to 1.7.6 to fix saving of admin field values
• [59e4206] Update section element in anchor link highlighting script (fixes #20)
• [35b4ef5] Pass wpdtrt-anchorlinks__additions in as a shortcode attribute
• [d2d096f] Be more flexible with expected section > heading structure
• [7a51600] Prevent additional <p></p> element from being injected after h2
• [911297d] Update wpdtrt-npm-scripts
• [058da3f] Prepend anchor IDs with a string to prevent them from starting with a number
• [771b033] Update wpdtrt-npm-scripts
• [110a172] Append date to nav header (fixes #19)