4.6.0

Changes

• feat: Change to "click" style tooltips, rather than hover style (better user
  experience)
• feat: Minor style changes to tooltips
• fix: Correct tooltip rendering issue on Firefox and Safari
• refactor: Convert all CSS to BEM methodology + maintain backwards compatibility
  for old CSS classes
• refactor: Update mEDRA API call to their newly updated client-side API
• refactor: Remove pointless preventDefault call on ReferenceList
• refactor: Improve / refactor Frontend.ts code
• refactor: Remove ".abt-url" reference from options-page
• test: Add tests for Frontend.ts
• test: Improve test coverage
• chore: Update deps
• chore: Add automatic translation upload to deploy script
• chore: Add stylint to test workflow + lint all files
• chore: Remove unneeded dependencies
• chore: Convert project to yarn package manager
• chore: Update travis.yml for yarn
• chore: Move "lint" into npm test script
• chore: Add inline citation style example

Styles Added

• Aix-Marseille Université - Département d'études asiatiques (French)
• Uppsala universitet - Historia

Closes #203, #202