shinySearchbar 1.0.0 - 5/14/20

• searchbar() as a ui function to include the searchbar widget
• updateMarkOptions() as a server function to update the mark.js options for an initialized searchbar widget
• Default mark.js options included internally as the configurator list (accessible with shinySearchbar:::configurator)
  • Passed to JavaScript in JSON format using jsonlite::toJSON()
• Designed around mark.js v8.1.1, including all API options except for the callback functions: each, filter, noMatch, and done (used interally)