rename function

src/Leaflet.js

@@ -60,7 +60,7 @@ export default class Leaflet extends React.Component{
     this.setState({savePathKey: event.target.value})
   }
 
-  newPathPoint = event => {
+  addMarker = event => {
     const { lat, lng } = event.latlng
     let pathCopy = this.state.path.slice();
     pathCopy.push([lat, lng]);
@@ -95,7 +95,7 @@ export default class Leaflet extends React.Component{
             zoom={this.state.zoom}
             zoomControl={false}
             style={{width: mapWidth, height: mapHeight}}
-            onClick={this.newPathPoint}
+            onClick={this.addMarker}
           >
               <TileLayer
                 attribution='&amp;copy <a href="http://osm.org/copyright">OpenStreetMap</a> contributors'