refactor(mikroorm): get mikroorm instance with class

lib/health-indicator/database/mikro-orm.health.ts

@@ -2,7 +2,7 @@ import { Injectable, NotImplementedException, Scope } from '@nestjs/common';
 import { ModuleRef } from '@nestjs/core';
 import { HealthCheckError } from '../../health-check/health-check.error';
 
-import type { Connection } from '@mikro-orm/core';
+import * as MikroOrmNestJS from '@mikro-orm/core';
 import { TimeoutError } from '../../errors';
 import {
   TimeoutError as PromiseTimeoutError,
@@ -100,10 +100,12 @@ export class MikroOrmHealthIndicator extends HealthIndicator {
   /**
    * Returns the connection of the current DI context
    */
-  private getContextConnection(): Connection | null {
-    const mikro = this.moduleRef.get('MikroORM', { strict: false });
+  private getContextConnection(): MikroOrmNestJS.Connection | null {
+    // eslint-disable-next-line @typescript-eslint/no-var-requires
+    const { MikroORM } = require('@mikro-orm/nestjs') as typeof MikroOrmNestJS;
+    const mikro = this.moduleRef.get(MikroORM, { strict: false });
 
-    const connection: Connection = mikro.em.getConnection();
+    const connection: MikroOrmNestJS.Connection = mikro.em.getConnection();
 
     if (!connection) {
       return null;
@@ -118,7 +120,7 @@ export class MikroOrmHealthIndicator extends HealthIndicator {
    * @param timeout The timeout how long the ping should maximum take
    *
    */
-  private async pingDb(connection: Connection, timeout: number) {
+  private async pingDb(connection: MikroOrmNestJS.Connection, timeout: number) {
     let check: Promise<any>;
     const type = connection.getPlatform().getConfig().get('type');