fix: change "waiting for connections on port" to "waiting for connections"

* change "waiting for connections on port" to "waiting for connections" (regex)

* remove unused import

Author: hasezoey

packages/mongodb-memory-server-core/src/__tests__/replset-single-restart-test.ts

@@ -1,6 +1,5 @@
 import MongoMemoryReplSet, { MongoMemoryReplSetOptsT } from '../MongoMemoryReplSet';
 import * as tmp from 'tmp';
-import getPort from 'get-port';
 
 let tmpDir: tmp.DirResult;
 beforeEach(() => {

packages/mongodb-memory-server-core/src/util/MongoInstance.ts

@@ -249,7 +249,7 @@ export default class MongoInstance {
     const line: string = message.toString();
     this.debug(`STDOUT: ${line}`);
 
-    if (/waiting for connections on port/i.test(line)) {
+    if (/waiting for connections/i.test(line)) {
       this.instanceReady();
     } else if (/addr already in use/i.test(line)) {
       this.instanceFailed(`Port ${this.opts.instance.port} already in use`);