method flyTo implementation in map

Bumps [acorn](https://github.com/acornjs/acorn) from 6.1.1 to 6.4.1.
- [Release notes](https://github.com/acornjs/acorn/releases)
- [Commits](acornjs/acorn@6.1.1...6.4.1)

Signed-off-by: dependabot[bot] <[email protected]>

Export Marker component

…pm_and_yarn/acorn-6.4.1

Bump acorn from 6.1.1 to 6.4.1

Example of usage:

```svelte
{#each $markers as marker (marker.id)}
  <Marker lon={marker.lon} lat={marker.lat} label={marker.name} />
{/each}
```
On this example, each Marker component is uniquely identify
by the key expression `(maker.id)`. When the markers list is updated
all removed markers are destroyed which means removed from the map.

Improvements about Map and Marker

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.15 to 4.17.19.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](lodash/lodash@4.17.15...4.17.19)

Signed-off-by: dependabot[bot] <[email protected]>

…npm_and_yarn/lodash-4.17.19

Bump lodash from 4.17.15 to 4.17.19

Update README.md

include render troubleshooting in readme example

Upgrade dependencies

Getting on click is a very important and frequently used event, We should provide it how we have provided on:recenter

onClick event emit in map component

… offset

Fixed issue 28

* Custom Markers as slot

This adds the ability to user HTML inside the Marker which is used as marker:

```svelte
<Marker
    popup={false}
    lat={geo.lat}
    lng={geo.lng}
    >
    <a href={waypoint.slug}>
        <p>TEST</p>
    </a>
</Marker>
```

* Support html syntax for popup content 

modifies this PR beyonk-group#26 to use slots

* fix

* Revert "Support html syntax for popup content"

* Add Popup html as slot

Should enable to use

```svelte
<Marker
            popup={true}
            lat={waypoint.geo.lat}
            lng={waypoint.geo.lng}
            > 
              <a href={waypoint.slug}>
                <p>MyMarker HTML</p>
              </a>

              <span slot="popup">
                 <p>My Popup HTML</p>
              </span>
            </Marker>
```

as well as
```svelte
<Marker
            popup={true}
            lat={waypoint.geo.lat}
            lng={waypoint.geo.lng}
            > 
              <span slot="popup">
                 <p>My Popup HTML</p>
              </span>
            </Marker>
```

as well as the default behaviour with label as marker text.

* bind zoom
add button for randomly changing zoom level

Co-authored-by: Antony Jones <[email protected]>

…ptional parameters on mapbox methods: options (default {}) to fitBounds and flyTo, eventData (default {}) to setCenter and setZoom, and position (default 'top-right') to addControl. (beyonk-group#39)