Schema log regenerates enum every time (even if no changes)

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Issue type:

[ ] question
[x] bug report
[ ] feature request
[ ] documentation issue

Database system/driver:

[ ] cordova
[ ] mongodb
[ ] mssql
[ ] mysql / mariadb
[ ] oracle
[x] postgres
[ ] sqlite
[ ] sqljs
[ ] react-native
[ ] expo

TypeORM version:

[x] latest
[ ] @next
[ ] 0.x.x (or put your version here)

Steps to reproduce or a small repository showing the problem:

I've created several enum columns, every time I create a migration or run schema:log typeorm calls CREATE TYPE for them, even if there have been no changes.

@Entity("equipmentmodels")
@Unique(["name"])
export class EquipmentModel {
  /* snipped other properties for simplicity */
  
  @PrimaryGeneratedColumn("uuid")
  id: string

  /** Type of equipment */
  @Column("enum", { enum: EquipmentModelType })
  type: EquipmentModelType

}
export enum EquipmentModelType {
  Thing1,
  Thing2,
  Thing3,
  Thing4
}

Consistently yields this

DROP TYPE "pcc"."devicemodels_type_enum_old";
ALTER TYPE "pcc"."equipmentmodels_type_enum" RENAME TO "equipmentmodels_type_enum_old";
CREATE TYPE "pcc"."equipmentmodels_type_enum" AS ENUM('0', '1', '2', '3');