Changes from V2.

[ biz-base : company ]
1. 'slug' field added (slug means same as 'subdomain' in Domain)

  @Column()
  slug: string

2. index added

@Index('ix_companies_1', (company: Company) => [company.slug], { unique: true })

3. added relation (company-bizplace)

  @OneToMany(type => Bizplace, bizplace => bizplace.company)
  bizplaces: Bizplace[]

  * maybe from this change, .. there is no changes in database scheme

[ biz-base : bizplace ]
1. relation changed

  @OneToMany(
    type => BizplaceUser,
    bizplaceUser => bizplaceUser.bizplace
  )
  users: []

  =>

  @ManyToMany(type => User)
  @JoinTable({ name: 'bizplaces_users' })
  users: User[]

  * bizplace - users relation should be a ManyToMany, but last time that was OneToMany
  * maybe from this change, .. relation table will be created : bizplaces_users

[ biz-base : bizplace-user ]
1. This entity should be removed (still it is remained)
   This entity will be auto generated by 'bizplace.users' relation
   => Need to check - what tables used before and after change.
