namespaces - PHP-intercom not working after updating composer -

i updated using composer. after updating getting error in php file , sending data intercom. error :

fatal error: class 'intercom\intercombasicauthclient' not found in <filename> 

i found similar problem here symfony exception (class not found) on development , production servers. couldn't understand how solve issue. tried using intercom in uppercase lowercase, problem not solved.

in installed.json found :

"autoload": {             "psr-4": {                 "intercom\\": [                     "src"                 ]             }         } 

and directory location of intercom files :

/public_html/vendor/intercom/intercom-php/src 

when dig more composers file(was trying understand how classes included , all), came across code in autoload_namespaces.json

<?php  // autoload_namespaces.php @generated composer  $vendordir = dirname(dirname(__file__)); $basedir = dirname($vendordir);  return array(     'libphonenumber' => array($vendordir . '/giggsey/libphonenumber-for-php/src'),     'phpamqplib' => array($vendordir . '/php-amqplib/php-amqplib'), ); 

libphonenumber , phpamqplib 2 libraries installed using composer, , intercom missing here.

so totally confused, actual problem. intercom library missing in autoload_namespace or uppercase-lowercase issue or what.

edit :

this found in autoload_psr4.php

<?php  // autoload_psr4.php @generated composer  $vendordir = dirname(dirname(__file__)); $basedir = dirname($vendordir);  return array(     'psr\\http\\message\\' => array($vendordir . '/psr/http-message/src'),     'jmespath\\' => array($vendordir . '/mtdowling/jmespath.php/src'),     'intercom\\' => array($vendordir . '/intercom/intercom-php/src'),     'guzzlehttp\\psr7\\' => array($vendordir . '/guzzlehttp/psr7/src'),     'guzzlehttp\\promise\\' => array($vendordir . '/guzzlehttp/promises/src'),     'guzzlehttp\\' => array($vendordir . '/guzzlehttp/guzzle/src'),     'aws\\' => array($vendordir . '/aws/aws-sdk-php/src'), ); 

and how including intercom in php file :

use intercom\intercombasicauthclient; 

i figured out myself. problem php version. using php-5.5 , intercom library strictly requires php version >= 5.6 .

created own library using intercom apis work php-5.5.