Update JS-dependencies, fix issues, get pkg-err

[trafficonese]

Bugfixes:

• fixes addWMSLegend based on layer groups in Shiny #81, fixes addSearchFeatures() issue in shiny - popup not working #104, fixes removeDrawToolbar clearFeatures doesn't work anymore #148, fixes AddWMSLegend does not work with Observe or ObserveEvent #155, fixes removeDrawToolbar() does not work. #156, fixes changing colors for addWebGLHeatmap() does not work #164, fixes Uncaught TypeError: t.drawToolbar.removeFrom is not a function #165, fixes npm install error  #169, fixes Customize text for tools of the draw tool bar #174, fixes Params doesnt work in addSearchOSM textPlaceholder #187

New Features

• The addDrawToolbar offers two new options: handlersOptions and toolbarOptions, with which you can customize the drawing toolbar and the tooltips.
• searchOSMText let's you set the OSM search text from R.
• addBounceMarkers behave now like normal Markers (except for clustering).
• Update Geodesics functions to show default or custom statistics in Control Info, show (draggable) Markers, use layerManager, enable popup/label/markerOptions/highlightOptions, emit Mouse Events, accept icons.
• New function addLatLng for addGeodesicPolylines
• Extend BingTiles imagerySet and emit warnings for deprecated sets

Improvements

• Updated most JavaScript dependencies
• Include Tests for R functions
• Use Github Actions (R-CMD-check, pkgdown, test-coverage, NPM builds, Styler, PR-commands)
• Fixed & extended examples
• Removed source-maps as package size was an R-CMD-check issue
• Add xfun package to Suggests for base64 encoding of icons

TODOs:

• Check/Adapt Documentation
• Geodesics: Added markers are lost after dragging of another marker.
• Check TODOs