Leaflet/Leaflet v1.3.0 on GitHub

Add tolerance option to L.Renderer instead of hardcoded tolerance for touch devices (#5922 by Muscot).

Use more stable form of Haversine formula (#5935 by jussimattas)
Add autoPan option to L.Marker (#5651 by alenaksu)
Cancel http requests for outdated tiles (#5615 by jbccollins)
Add closeOnEscapeKey option to L.Popup (#5730 by Mickyfen17)
Add tileerror tests to L.GridLayer spec (#5805 by msiadak)
Use eachLayer method for iterations over layers in L.LayerGroup (#5809 by cherniavskii)
Change Util.formatNum default to 6 decimals (#5492 by fminuti)
Fire zoomlevelschange event when calling setMinZoom & setMaxZoom (#5230 by mynameisstephen)
Use zoom parameter if passed to L.TileLayer's getTileUrl method (#5822 by broncha)
Round circle radius in renderer instead of layer (#5859 by perliedman)
Make L.LayerGroup accept options (#5792 by iH8)
Round pan offset towards zero (#5858 by perliedman)
Improve heuristic for what event targets are considered markers (#5885 by perliedman)
Add typeof check to checkDeprecatedMixinEvents (#5901 by murb)
Optimize images (#5936 by grischard)
Add addTo static function to L.Handler class (#5930 by cherniavskii)
L.ImageOverlay accepts ImageElement (#5948 by ronikar)

Fix adding CSS classes in L.VideoOverlay, which caused map crash in IE8 (#5731 by Dzwiedzminator and #5785 by cherniavskii)
No inertia if drag is stopped before ending the drag (#5690 by perliedman)
Remove tiles from the _tiles cache when they're aborted (#5634 by oliverheilig)
Use same condition for adding as well as removing double tap listener (#5598 by perliedman)
Correctly wrap tile coordinate bounds (#5715 by perliedman)
Fix L.TileLayer infinite error loop (#5783 by cherniavskii)
Fix map not rendering when images have max-height (#5778 by idanen)
Add defensive check for this._map in L.Marker's update method (#5736 by dnepromell)
Fix zoom when map container is scaled (#5794 by cherniavskii)
Update DomPointer.js to revert typo (#5817 by daverayment)
Fix L.ImageOverlay className option (#5830 by cherniavskii)
Fix L.TileLayer.WMS when using Polar stereographic (#5618 by scaddenp)
Stop animation before removing map (#5876 by dnepromell and #5918 by aaronplanell)
Stop locate before removing map (#5893 by ghybs)
Reset GridLayer's _tileZoom to undefined instead of null (#5888 by iH8)
Fix L.Map's map.flyTo method to respect noMoveStart option (#5923 by iPrytz)
Fix map pan when touchZoom is disabled (#5952 by cherniavskii)
Fix L.SVG to reset size on remove from map (#5966 by ghybs)
Fix L.Marker to set alt attribute for img-based Icons only (#5979 by msiadak)

Add documentation for PolyLine.closestLayerPoint (#5701 by perliedman)
Replace urls for samples in wms documentation (#5712 by jjimenezshaw)
Add DomEvent.stop event type to docs (#5733 by theashyster)
Update links to GeoJSON spec in GeoJSON examples (#5725 by astridx)
Improve docs for L.LatLngBounds pad method (#5748 by CalvinWilliams1012)
Improve Zoom-levels documentation to reflect function properly (#5769 by CalvinWilliams1012)
Fix map's height and width in examples to make attributions visible on mobile (#5772 by CalvinWilliams1012 and #5819 by cherniavskii)
Fix L.FeatureGroup bringToBack method docs (#5788 by fpopa)
Fix L.LatLng distanceTo method description (#5791 by loisgh)
Fix docs redirects to latest version reference (#5824 by cherniavskii)
Add CDN alternatives (#5837 by ghybs)
Update docs for L.DomEvent.off() (#5855 by 77ganesh and #5976 by kring)
Move L.SVG factory docs to appropriate place (#5864 by cherniavskii)
New Leaflet playgrounds on Plunker, Codepen and JSFiddle (#5868 by iH8)
Clarify that any option keys can be used (#5877 by perliedman)
Add notes about some classes not inheriting Class (#5878 by perliedman)
Clean up and document event propagation properties (#5880 by perliedman)
Update building instructions (#5911 by shadeland)
Document mouseup event for interactive L.Layer (#5941 by germansokolov13)
Document L.Icon's tooltipAnchor option, update tooltipAnchor and popupAnchor default values docs (#5989 by cherniavskii)

Tweak legacy option in rollup config - now Leaflet works in IE again (#5929 by IvanSanchez)
Remove warning alert in watch bundle (#5714 by perliedman)
New rollup config signature (#5812 by iH8)