plugin.xml

<?xml version='1.0' encoding='utf-8'?>
<plugin id="cordova-plugin-messager" version="1.0.0" xmlns="http://apache.org/cordova/ns/plugins/1.0" xmlns:android="http://schemas.android.com/apk/res/android">
    <name>cordova-plugin-messager</name>
    <js-module name="cordova-plugin-messager" src="www/cordova-plugin-messager.js">
        <clobbers target="CDVMessager" />
    </js-module>

    <engines>
        <engine name="cordova" version=">=7.0.0"/>
        <engine name="cordova-android" version=">=6.2.1"/>
        <engine name="cordova-ios" version=">=4.4.0"/>
    </engines>

    <!-- android -->
    <platform name="android">
         <config-file parent="/*" target="res/xml/config.xml">
            <feature name="CDVMessager">
                <param name="android-package" value="daihere.cordova.plugin.CDVMessager"/>
            </feature>
        </config-file>

        <config-file target="AndroidManifest.xml" parent="/*">
            <uses-permission android:name="android.permission.INTERNET" />
            <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
            <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
        </config-file>

        <!-- plugin source code -->
        <source-file src="src/android/CDVMessager.java" target-dir="src/daihere/cordova/plugin"/>

        <!-- PAHO Library -->
        <source-file src="src/android/libs/paho-client.jar" target-dir="libs"/>
        <source-file src="src/android/libs/paho-service.jar" target-dir="libs"/>
    </platform>
    
    <!-- ios -->
    <platform name="ios">
        <config-file parent="/*" target="config.xml">
            <feature name="CDVMessager">
                <param name="ios-package" value="CDVMessager"/>
            </feature>
        </config-file>

        <!-- plugin source code -->
        <header-file src="src/ios/CDVMessager.h"/>
        <source-file src="src/ios/CDVMessager.m"/>
  
        <framework src="MQTTClient" type="podspec" spec="~> 0.9.9"/>  
    </platform>
</plugin>