Bump pg from 0.21.0 to 1.2.3

Bumps [pg](https://github.com/ged/ruby-pg) from 0.21.0 to 1.2.3.
- [Release notes](https://github.com/ged/ruby-pg/releases)
- [Changelog](https://github.com/ged/ruby-pg/blob/master/History.rdoc)
- [Commits](https://github.com/ged/ruby-pg/compare/v0.21.0...v1.2.3)

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

Gemfile

@@ -29,7 +29,7 @@ gem "order_management", path: "./engines/order_management"
 gem 'web', path: './engines/web'
 
 gem 'activerecord-postgresql-adapter'
-gem 'pg', '~> 0.21.0'
+gem 'pg', '~> 1.2.3'
 
 gem 'acts_as_list', '1.0.4'
 gem 'cancancan', '~> 1.15.0'

Gemfile.lock

@@ -384,7 +384,7 @@ GEM
       xml-simple
     paypal-sdk-merchant (1.117.2)
       paypal-sdk-core (~> 0.3.0)
-    pg (0.21.0)
+    pg (1.2.3)
     power_assert (2.0.0)
     pry (0.13.1)
       coderay (~> 1.1)
@@ -694,7 +694,7 @@ DEPENDENCIES
   paperclip (~> 3.4.1)
   paranoia (~> 2.4)
   paypal-sdk-merchant (= 1.117.2)
-  pg (~> 0.21.0)
+  pg (~> 1.2.3)
   pry
   pry-byebug
   rack-mini-profiler (< 3.0.0)