Update composer php version

Upgrade composer version

composer self-update

Source: stackoverflow.com

Update composer php version

php7.3 -f /usr/local/bin/composer update

Update composer

 To update composer command just find location of composer.phar and update as:
 where composer 	#Retrieves you location of your composer.phar
 cd path_to_composer.phar #Move to directory with composer.phar
 php composer.phar self-update	#Update your composer

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