leaflet 2.0.1
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FEATURES

* Added method `addMapPane` to add custom pane layers to have fine tune control over layer ordering. New feature from within leaflet.js v1.x. (#549)
* Exposed htmlwidgets sizingPolicy in leaflet() (#548)

BUG FIXES and IMPROVEMENTS

* Default marker icon locations will now use unpkg.com instead of the leaflet cdn when using https or file protocols. (#544)
* `.leaflet-map-pane` `z-index` switched to 'auto'. Allows for map panes to appear above the map if they appear later in the dom. (#537)
* Use correct Leaflet.js scale control remove method. (#547)
* Start from world view if using flyTo or flyToBounds. (#552)


leaflet 2.0.0
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BREAKING CHANGES

* Update to latest leaflet.js v1.3.1 (#453, 314616f)  Please see http://leafletjs.com/reference-1.3.0.html for the latest documentation

* All plugins updated to versions compatible with leaflet > 1.0 (#458)

    - jQuery, https://github.com/jquery/jquery
    - Leaflet (JavaScript library), https://github.com/Leaflet/Leaflet
    - Leaflet Providers, https://github.com/leaflet-extras/leaflet-providers
    - leaflet-measure, https://github.com/ljagis/leaflet-measure
    - Leaflet.Terminator, https://github.com/joergdietrich/Leaflet.Terminator
    - Leaflet.SimpleGraticule, https://github.com/ablakey/Leaflet.SimpleGraticule
    - Leaflet.MagnifyingGlass, https://github.com/bbecquet/Leaflet.MagnifyingGlass
    - Leaflet.MiniMap, https://github.com/Norkart/Leaflet-MiniMap
    - Leaflet.awesome-markers, https://github.com/lvoogdt/Leaflet.awesome-markers
    - Leaflet.EasyButton, https://github.com/CliffCloud/Leaflet.EasyButton/
    - Proj4Leaflet, https://github.com/kartena/Proj4Leaflet
    - leaflet-locationfilter, https://github.com/kajic/leaflet-locationfilter
    - leaflet-omnivore, https://github.com/mapbox/leaflet-omnivore
    - topojson, https://github.com/topojson/topojson

* Leaflet.label (https://github.com/Leaflet/Leaflet.labelExtension)

    - `L.Label` has been adopted within Leaflet.js to `L.Tooltip`
    - Tooltips are now displayed with default Leaflet.js styling
    - In custom javascript extensions, change all  `*.bindLabel()` to `*.bindTooltip()`

BUG FIXES AND FEATURES

* Relative protocols are used where possible when adding tiles (#526). In RStudio 1.1.x on linux and windows, a known issue of 'https://' routes fail to load, but works within browsers (rstudio/rstudio#2661).

* Added more providers for `addProviderTiles()`: "OpenStreetMap.CH", "OpenInfraMap", "OpenInfraMap.Power", "OpenInfraMap.Telecom", "OpenInfraMap.Petroleum", "OpenInfraMap.Water", "OpenPtMap", "OpenRailwayMap", "OpenFireMap", "SafeCast". (4aea447)

* `L.multiPolyline` was absorbed into `L.polyline`, which accepts multiple an array of polyline information. http://leafletjs.com/reference-1.3.0.html#polyline. (#515)

* Fix bug where icons where anchored to the top-center, not center-center (2a60751)

* Fix bug where markers would not appear in self contained knitr files (cc79bc3)

* leaflet-label plugin now L.tooltip in leaflet.js.  labelOptions() now translates old options clickable to interactive and noHide to permanent.

* Fix a bug where the default `addTiles()` would not work with .html files
  served directly from the filesystem.

* Add `groupOptions` function. Currently the only option is letting you specify
  zoom levels at which a group should be visible.

* Fix bug with accessing columns in formulas when the data source is a Crosstalk
  SharedData object wrapping a spatial data frame or sf object.

* Fix strange wrapping behavior for legend, especially common for Chrome when
  browser zoom level is not 100%.

* Fix incorrect opacity on NA entry in legend. (PR #425)

* Added support for drag events (#405)

* Ensure type safety of .indexOf(stamp) (#396)

* `validateCoords()` warns on invalid polygon data (#393)

* Added `method` argument to `addRasterImage()` to enable nearest neighbor interpolation when projecting categorical rasters (#462)

* Added an `'auto'` method for `addRasterImage()`. Projected factor results are coerced into factors. (9accc7e)

* Added `data` parameter to remaining `addXXX()` methods, including addLegend. (f273edd, #491, #485)

* Added `preferCanvas` argument to `leafletOptions()` (#521)


leaflet 1.1.0
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* Add support for sf. sf, sfc, and sfg classes are supported with POINT,
  LINESTRING, MULTILINESTRING, POLYGON, and MULTIPOLYGON geometries (note
  that MULTIPOINT is not currently supported).

* Added support for Crosstalk (https://rstudio.github.io/crosstalk/).

* Added option to highlight polygons, polylines, circles, and rectangles on
  hover (use highlightOptions parameter).

* Fix behavior when data contains NA points, or zero rows. Previously this would
  cause an error.

* Added `popupOptions` parameter to all markers and shape layers.

* Upgraded existing plugins to their respective latest versions and added
  missing/new functionality from those plugins. (PR #293)

* Added Proj4Leaflet plugin (PR #294).

* Added EasyButton plugin (PR #295).

* Added Graticule plugin (PR #293).

* Color palette improvements. All color palette functions now support viridis
  palettes ("viridis", "magma", "inferno", and "plasma").

* Color palette functions now support reversing the order in which colors are
  used, via reverse=TRUE.

* `colorFactor` no longer interpolates qualitative RColorBrewer palettes,
  unless the number of factor levels being mapped exceeds the number of colors
  in the specified RColorBrewer palette. (Issue #300)

* Upgrade leaflet.js to 0.7.7.1 (PR #359)

* Added a way for the Map instance to be instantiated via a factory.

leaflet 1.0.2
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* When used with `leafletProxy`, `fitBounds` did not return its input object as
  output, so magrittr chains would break after `fitBounds` was called.

* Add addMeasure()/removeMeasure() functions to allow users to measure lines and
  areas, via the leaflet-measure plugin by @ljagis. (PR #171. Thanks, Kenton
  Russell!)

* Add `input${mapid}_center` Shiny event.

* Add support for labels on most layers, that show either statically or on
  hover. (PR #181. Thanks Bhaskar Karambelkar!)

* Add support for markers with configurable colors and icons, via the
  Leaflet.awesome-markers plugin by @lvoogdt. See `?addAwesomeMarkers`.
  (PR #184. Great work, Bhaskar!)

* Add support for the Leaflet.Terminator plugin by @joergdietrich. Overlays
  day and night regions on a map. See `?addTerminator`. (PR #184, thanks
  Bhaskar!)

* Add support for Leaflet.SimpleGraticule plugin by @ablakey. See
  `?addSimpleGraticule`. (PR #184, thanks again Bhaskar!)

* Add support for Leaflet.MagnifyingGlass plugin by @bbecquet. Adds a
  configurable magnifying glass that displays the area under the cursor at an
  increased zoom level. See `?addMagnifyingGlass`. (PR #184, still Bhaskar!)

* Add support for Leaflet-MiniMap plugin by @Norkart. Adds a mini map to the
  corner that can be used to see or change the bounds of the main map. See
  `?addMiniMap`. (PR #184, Bhaskar again!)

* `addScaleBar` and related functions added, for showing Leaflet's built-in
  scale bar in one of the corners of the map. (PR #201. Thanks Kent Johnson!)


leaflet 1.0.1
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* Fix #242: Compatibility with htmlwidgets 0.6 (thanks byzheng).


leaflet 1.0.0
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* Initial release
