Add composer 1.8.2, remove composer 1.8.1
Add composer 1.8.2, remove composer 1.8.1

for stack(s) cflinuxfs2, cflinuxfs3 [#163559852]

cloudfoundry/php-buildpack,cf-identity/php-buildpack,cloudfoundry/php-buildpack,cloudfoundry/php-buildpack,cloudfoundry/php-buildpack,cf-identity/php-buildpack,cloudfoundry/php-buildpack,cf-identity/php-buildpack,cloudfoundry/php-buildpack,cf-identity/php-buildpack,cf-identity/php-buildpack,cf-identity/php-buildpack,cloudfoundry/php-buildpack,cf-identity/php-buildpack