Bump mapv from 2.0.38 to 2.0.40

Bumps [mapv](https://github.com/huiyan-fe/mapv) from 2.0.38 to 2.0.40.
- [Release notes](https://github.com/huiyan-fe/mapv/releases)
- [Commits](https://github.com/huiyan-fe/mapv/commits)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

package.json

@@ -123,7 +123,7 @@
     "lodash.remove": "^4.7.0",
     "lodash.topairs": "4.3.0",
     "mapbox-gl": "1.3.1",
-    "mapv": "2.0.38",
+    "mapv": "2.0.40",
     "openlayers": "4.6.5",
     "pbf": "3.0.2",
     "proj4": "2.5.0",