Update dependency leaflet to v1.9.4

Author: renovate[bot]

package-lock.json

@@ -12,10 +12,10 @@ leaflet.markercluster@~1:
   resolved "https://registry.npmjs.org/leaflet.markercluster/-/leaflet.markercluster-1.4.1.tgz"
   integrity sha512-ZSEpE/EFApR0bJ1w/dUGwTSUvWlpalKqIzkaYdYB7jaftQA/Y2Jav+eT4CMtEYFj+ZK4mswP13Q2acnPBnhGOw==
 
-leaflet@~1:
-  version "1.3.4"
-  resolved "https://registry.npmjs.org/leaflet/-/leaflet-1.3.4.tgz"
-  integrity sha512-FYL1LGFdj6v+2Ifpw+AcFIuIOqjNggfoLUwuwQv6+3sS21Za7Wvapq+LhbSE4NDXrEj6eYnW3y7LsaBICpyXtw==
+leaflet@^1.9.4:
+  version "1.9.4"
+  resolved "https://registry.yarnpkg.com/leaflet/-/leaflet-1.9.4.tgz#23fae724e282fa25745aff82ca4d394748db7d8d"
+  integrity sha512-nxS1ynzJOmOlHp+iL3FyWqK89GtNL8U8rvlMOsQdTTssxZwCXh8N2NB3GDQOL+YR3XnWyZAxwQixURb+FA74PA==
 
 underscore@~1.13.0:
   version "1.13.6"