composer 1 memory limit

## issue
composer will run into memory limit due to memory leak when checking lot of package.

## solution:

### temporary usage unlimited memory

php -d memory\_limit=-1 /usr/local/bin/composer require prettus/l5-repository

/usr/bin/composer

php -d memory\_limit=-1 /usr/bin/composer update

### update to composer 2

need to check if current package support composer 2 or not.