Update composer/composer from 1.4.1 to 1.5.2

[dependencies]

composer/composer has been updated to 1.5.2 by dependencies.io.

1.5.2

• Fixed GitLabDriver looping endlessly in some conditions
  • Fixed GitLabDriver support for unauthenticated requests
  • Fixed GitLab zip downloads not triggering credentials prompt if unauthenticated
  • Fixed path repository support of COMPOSER_ROOT_VERSION, it now applies to all path repos within the same git repository
  • Fixed path repository handling of copies to avoid copying VCS files and others
  • Fixed sub-directory call to ignore list and create-project commands as well as calls to Composer using --working-dir
  • Fixed invalid warning appearing when calling remove on an non-stable package

1.5.1

• Fixed regression in GitLabDriver with repos containing >100 branches or tags
  • Fixed sub-directory call support to respect the COMPOSER env var

1.5.0

• Changed the package install order to ensure that plugins are always installed as soon as possible
  • Added ability to call composer from within sub-directories of a project
  • Added support for GitLab API v4 (v3 will not be supported as of August 22nd)
  • Added support for GitLab sub-groups
  • Added some more rules to composer validate
  • Added support for reading the USER env when guessing the username in composer init
  • Added warning when uncompressing files with the same name but difference cases on case insensitive filesystems
  • Added htaccess-protect option / COMPOSER_HTACCESS_PROTECT env var to disable the .htaccess creation in home dir (defaults to true)
  • Improved clear-cache command
  • Minor improvements/fixes and many documentation updates

1.4.3

• Fixed GitLab URLs
  • Fixed root package version detection using latest git versions
  • Fixed inconsistencies in date format in composer.lock when installing from source
  • Fixed Mercurial support regression
  • Fixed exclude-from-classmap not being applied when autoloading files for Composer plugins
  • Fixed exclude-from-classmap being ignored when cwd has the wrong case on case insensitive filesystems
  • Fixed several other minor issues

1.4.2

• Fixed Bitbucket API handler parsing old deleted branches in hg repos
  • Fixed regression in gitlab downloads
  • Fixed output inconsistencies
  • Fixed unicode handling in init command for author names
  • Fixed useless warning when doing partial updates/removes on packages that are not currently installed
  • Fixed xdebug disabling issue when combined with disable_functions and allow_url_fopen CLI overrides