fix: print MQTTjs version and environment on constructor (#1816)

* fix: print  mqttjs version and environment on constructor

* fix: prevent esbuild to pick up the entire pakcage.json

esbuild.js

@@ -2,6 +2,7 @@ const { build } = require('esbuild')
 const { polyfillNode } = require('esbuild-plugin-polyfill-node');
 const { rimraf } = require('rimraf')
 const fs = require('fs')
+const { version } = require('./package.json');
 
 const outdir = 'dist'
 
@@ -15,6 +16,9 @@ const options = {
     format: 'iife',
     platform: 'browser',
     globalName: 'mqtt',
+    define: {
+        'process.env.npm_package_version': JSON.stringify(version),
+    },
     sourcemap: false, // this can be enabled while debugging, if we decide to keep this enabled we should also ship the `src` folder to npm
     plugins: [
         polyfillNode({

src/lib/client.ts

@@ -38,6 +38,7 @@ import {
 import TopicAliasSend from './topic-alias-send'
 import { TypedEventEmitter } from './TypedEmitter'
 import PingTimer from './PingTimer'
+import isBrowser, { isWebWorker } from './is-browser'
 
 const setImmediate =
 	globalThis.setImmediate ||
@@ -488,6 +489,17 @@ export default class MqttClient extends TypedEventEmitter<MqttClientEventCallbac
 		this.log = this.options.log || _debug('mqttjs:client')
 		this.noop = this._noop.bind(this)
 
+		this.log('MqttClient :: version:', process.env.npm_package_version)
+
+		if (isWebWorker) {
+			this.log('MqttClient :: environment', 'webworker')
+		} else {
+			this.log(
+				'MqttClient :: environment',
+				isBrowser ? 'browser' : 'node',
+			)
+		}
+
 		this.log('MqttClient :: options.protocol', options.protocol)
 		this.log(
 			'MqttClient :: options.protocolVersion',