Bump leaflet-rails from 1.3.1 to 1.4.0

Bumps [leaflet-rails](https://github.com/axyjo/leaflet-rails) from 1.3.1 to 1.4.0.
- [Release notes](https://github.com/axyjo/leaflet-rails/releases)
- [Changelog](https://github.com/axyjo/leaflet-rails/blob/master/CHANGELOG.md)
- [Commits](axyjo/leaflet-rails@v1.3.1...v1.4.0)

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

Gemfile

@@ -28,7 +28,7 @@ gem 'parse-cron'
 
 gem 'rack-cors', require: 'rack/cors'
 gem 'geocoder', '~> 1.4'
-gem 'leaflet-rails', '~> 1.0'
+gem 'leaflet-rails', '~> 1.4'
 gem 'nokogiri'
 gem 'draper', '~> 3.1'
 gem 'responders'

Gemfile.lock

@@ -152,7 +152,7 @@ GEM
       thor (>= 0.14, < 2.0)
     json (2.2.0)
     jwt (2.1.0)
-    leaflet-rails (1.3.1)
+    leaflet-rails (1.4.0)
       rails (>= 4.2.0)
     libv8 (6.7.288.46.1)
     listen (3.1.5)
@@ -408,7 +408,7 @@ DEPENDENCIES
   guard-rspec
   has_scope (~> 0.7.1)
   jquery-rails
-  leaflet-rails (~> 1.0)
+  leaflet-rails (~> 1.4)
   listen
   mini_racer
   nokogiri