Release 6.0.0

• Merge pull request #143 from planttheidea/dependabot/npm_and_yarn/ini-1.3.7 (72dda7a)
• Merge pull request #144 from planttheidea/dependabot/npm_and_yarn/node-notifier-8.0.1 (681a85d)
• Bump node-notifier from 8.0.0 to 8.0.1 (b7ba8a5)
• Bump ini from 1.3.5 to 1.3.7 (031b679)
• Merge pull request #142 from planttheidea/dependabot/npm_and_yarn/highlight.js-10.4.1 (bcd9c39)
• Bump highlight.js from 10.2.1 to 10.4.1 (9fc66dc)