Update dependencies and fix some issues (#137)

Fix some issues after updating+
ol-ext 4.0.11

@types/ol-ext/index.d.ts

@@ -0,0 +1 @@
+// index.d.ts

@types/ol-ext/legend/Item.d.ts

@@ -1,4 +1,3 @@
-import type BaseObject from 'ol/Object';
 import type Feature from 'ol/Feature'
 import type { StyleLike } from 'ol/style/Style'
 import type { Size } from 'ol/size'

examples/README.md

@@ -16,15 +16,15 @@
    cd /path/to/types-ol-ext
    git clone git@github.com:Viglino/ol-ext.git
    cd ol-ext
-   npm install
+   yarn install
    ```
 
 3. Check whether original JavaScript ol-ext examples can be launched locally.
 
    ```bash
    cd /path/to/types-ol-ext
    cd ol-ext
-   npm run start
+   yarn start
    ```
 
    Then access [http://localhost:8181](http://localhost:8181) and check some examples.

examples/routing/map.source.dijkstra.ts

@@ -153,7 +153,8 @@ dijkstra.direction = function (feature) {
 // Get the real length of the geom
 dijkstra.getLength = function (geom) {
   let castedGeom: Geometry
-  if (geom instanceof Feature<Geometry>) {
+  const f = Feature<Geometry>
+  if (geom instanceof f) {
     castedGeom = geom.getGeometry()!
     return getLength(castedGeom)
   }