chore: use pattern match for detecting postgres database [pf]

Allow custom IAM Postgres database to be correctly recognised as postgres

db/migrations/migration_helper.rb

@@ -23,7 +23,7 @@ def mysql?
     end
 
     def postgres?
-      adapter == "postgres"
+      adapter =~ /postgres/
     end
 
     def adapter

lib/db.rb

@@ -71,7 +71,7 @@ def self.mysql?
   end
 
   def self.postgres?
-    !!(PACT_BROKER_DB.adapter_scheme.to_s == "postgres")
+    !!(PACT_BROKER_DB.adapter_scheme.to_s =~ /postgres/)
   end
 
   PACT_BROKER_DB ||= connection_for_env ENV.fetch("RACK_ENV")

lib/pact_broker/config/runtime_configuration_database_methods.rb

@@ -72,7 +72,7 @@ def database_connection_validation_timeout= database_connection_validation_timeo
           end
 
           def postgres?
-            database_credentials[:adapter] == "postgres"
+            database_credentials[:adapter] =~ /postgres/
           end
           private :postgres?
 

lib/pact_broker/repositories/helpers.rb

@@ -36,7 +36,7 @@ def mysql?
       end
 
       def postgres?
-        Sequel::Model.db.adapter_scheme.to_s == "postgres"
+        Sequel::Model.db.adapter_scheme.to_s =~ /postgres/
       end
 
       def select_all_qualified

lib/sequel/plugins/upsert.rb

@@ -101,7 +101,7 @@ def mysql?
         end
 
         def postgres?
-          model.db.adapter_scheme.to_s == "postgres"
+          model.db.adapter_scheme.to_s =~ /postgres/
         end
 
         def values_to_update

tasks/database.rb

@@ -128,7 +128,7 @@ def ensure_not_production
     end
 
     def psql?
-      adapter == "postgres"
+      adapter =~ /postgres/
     end
 
     def sqlite?