Merge pull request rails#43267 from the-spectator/big_int_generator_fix

Fixes rails#43266 Add `bigint` to `NATIVE_DATABASE_TYPES` in mysql & postgres adapter

Author: rafaelfranca

activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb

@@ -31,6 +31,7 @@ class AbstractMysqlAdapter < AbstractAdapter
         string:      { name: "varchar", limit: 255 },
         text:        { name: "text" },
         integer:     { name: "int", limit: 4 },
+        bigint:      { name: "bigint" },
         float:       { name: "float", limit: 24 },
         decimal:     { name: "decimal" },
         datetime:    { name: "datetime" },

activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb

@@ -125,6 +125,7 @@ def new_client(conn_params)
         string:      { name: "character varying" },
         text:        { name: "text" },
         integer:     { name: "integer", limit: 4 },
+        bigint:      { name: "bigint" },
         float:       { name: "float" },
         decimal:     { name: "decimal" },
         datetime:    {}, # set dynamically based on datetime_type