Bump mapv from 2.0.40 to 2.0.42

dependabot-preview[bot] · web-flow · commit 47cc2ed9741a · 2019-12-23T12:09:18.000Z
Bumps [mapv](https://github.com/huiyan-fe/mapv) from 2.0.40 to 2.0.42. - [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>
diff --git a/package.json b/package.json
@@ -125,7 +125,7 @@
     "lodash.remove": "^4.7.0",
     "lodash.topairs": "4.3.0",
     "mapbox-gl": "1.3.1",
-    "mapv": "2.0.40",
+    "mapv": "2.0.42",
     "ol": "6.1.1",
     "pbf": "3.0.2",
     "proj4": "2.5.0",
