Fix circular dependencies in migrator

src/orm/directive/CreateMigrationDirective.ts

@@ -2,11 +2,13 @@ import {Directive, OptionDefinition} from '../../cli'
 import {Injectable} from '../../di'
 import {stringToPascal} from '../../util'
 import {templateMigration} from '../template/migration'
+import {CLIDirective} from '../../cli/decorators'
 
 /**
  * CLI directive that creates migration classes from template.
  */
 @Injectable()
+@CLIDirective()
 export class CreateMigrationDirective extends Directive {
     getDescription(): string {
         return 'create a new migration'