Configurable gem pg version

Signed-off-by: Ko Nagase <[email protected]>

Author: sanak

Gemfile

@@ -5,6 +5,6 @@ gem 'immutable-struct'
 gem "rgeo"
 gem "rgeo-geojson"
 gem "rgeo-activerecord"
-gem "pg", "~> 1.0.0" # make sure we use a version compatible with AR
+gem "pg", (ENV['GEM_PG_VERSION'] ? "~> #{ENV['GEM_PG_VERSION']}" : "~> 1.0.0") # make sure we use a version compatible with AR
 gem 'activerecord-postgis-adapter'
 gem 'rails-controller-testing' # This gem brings back assigns to your controller tests as well as assert_template to both controller and integration tests.