fix: type imports for optional packages

lib/health-indicator/database/typeorm.health.ts

@@ -1,8 +1,8 @@
 import { Injectable, Scope } from '@nestjs/common';
-import type { Connection } from 'typeorm';
 import { ModuleRef } from '@nestjs/core';
 import { HealthCheckError } from '../../health-check/health-check.error';
 
+import * as TypeOrm from 'typeorm';
 import * as NestJSTypeOrm from '@nestjs/typeorm';
 
 import {
@@ -22,7 +22,7 @@ export interface TypeOrmPingCheckSettings {
    * The connection which the ping check should get executed
    */
   // `any` type in case of typeorm version mismatch
-  connection?: Connection | any;
+  connection?: TypeOrm.Connection | any;
   /**
    * The amount of time the check should require in ms
    */
@@ -58,7 +58,7 @@ export class TypeOrmHealthIndicator extends HealthIndicator {
   /**
    * Returns the connection of the current DI context
    */
-  private getContextConnection(): Connection | null {
+  private getContextConnection(): TypeOrm.Connection | null {
     const {
       getConnectionToken,
     } = require('@nestjs/typeorm/dist/common/typeorm.utils') as typeof NestJSTypeOrm;
@@ -94,7 +94,7 @@ export class TypeOrmHealthIndicator extends HealthIndicator {
    * @param timeout The timeout how long the ping should maximum take
    *
    */
-  private async pingDb(connection: Connection, timeout: number) {
+  private async pingDb(connection: TypeOrm.Connection, timeout: number) {
     let check: Promise<any>;
     switch (connection.options.type) {
       case 'mongodb':
@@ -126,7 +126,7 @@ export class TypeOrmHealthIndicator extends HealthIndicator {
     let isHealthy = false;
     this.checkDependantPackages();
 
-    const connection: Connection | null =
+    const connection: TypeOrm.Connection | null =
       options.connection || this.getContextConnection();
     const timeout = options.timeout || 1000;
 

lib/health-indicator/microservice/grpc.health.ts

@@ -1,7 +1,6 @@
 import { HealthCheckError } from '../../health-check/health-check.error';
 import { Injectable, Scope } from '@nestjs/common';
 import type * as NestJSMicroservices from '@nestjs/microservices';
-import type { GrpcOptions } from '@nestjs/microservices';
 import { join } from 'path';
 import { Observable } from 'rxjs';
 import {
@@ -54,7 +53,7 @@ interface GRPCHealthService {
 /**
  * @internal
  */
-type GrpcOptionsOptions = PropType<GrpcOptions, 'options'>;
+type GrpcOptionsOptions = PropType<NestJSMicroservices.GrpcOptions, 'options'>;
 
 /**
  * The function to check whether the service is up or down

lib/health-indicator/microservice/microservice.health.ts

@@ -1,14 +1,6 @@
 import { HealthCheckError } from '../../health-check/health-check.error';
 import { Injectable, Scope } from '@nestjs/common';
 import * as NestJSMicroservices from '@nestjs/microservices';
-import {
-  GrpcOptions,
-  MqttOptions,
-  NatsOptions,
-  RedisOptions,
-  RmqOptions,
-  TcpOptions,
-} from '@nestjs/microservices';
 import { TimeoutError } from '../../errors';
 import {
   checkPackages,
@@ -18,12 +10,12 @@ import {
 import { HealthIndicator, HealthIndicatorResult } from '../';
 
 type ClientOptions =
-  | RedisOptions
-  | NatsOptions
-  | MqttOptions
-  | GrpcOptions
-  | TcpOptions
-  | RmqOptions;
+  | NestJSMicroservices.RedisOptions
+  | NestJSMicroservices.NatsOptions
+  | NestJSMicroservices.MqttOptions
+  | NestJSMicroservices.GrpcOptions
+  | NestJSMicroservices.TcpOptions
+  | NestJSMicroservices.RmqOptions;
 
 /**
  * The options for the `MicroserviceHealthInidcator`

lib/terminus-lib.provider.ts

@@ -7,7 +7,7 @@ import { checkPackages } from './utils';
  *
  * @internal
  */
-export const TerminusLibProvider: Provider = {
+export const TerminusLibProvider = {
   provide: TERMINUS_LIB,
   useFactory: () => {
     const [terminus] = checkPackages(