Update composer/composer in / from 1.5.6 to 1.6.3

[ghost]

Dependencies.io has updated composer/composer (a packagist dependency in /) from "1.5.6" to "1.6.3".

1.6.3

• Fixed GitLab downloads failing in some edge cases
  • Fixed ctrl-C handling during create-project
  • Fixed GitHub VCS repositories not prompting for a token in some conditions
  • Fixed SPDX license identifiers being case sensitive
  • Fixed and clarified a few dependency resolution error reporting strings
  • Fixed SVN commit log fetching in verbose mode when using private repositories

1.6.2

• Fixed more autoloader regressions
  • Fixed support for updating dist refs in gitlab URLs

1.6.1

• Fixed upgrade regression due to some autoloader cleanups
  • Fixed some overly loose version constraints

1.6.0

• Improved performance of installs and updates from git clones when checking out known commits
  • Added check-platform-reqs command that checks that your PHP and extensions versions match the platform requirements of the installed packages
  • Added support for SPDX license identifiers v3.0, deprecates GPL/LGPL/AGPL identifiers, which should now have a -only or -or-later suffix added.
  • Added --with-all-dependencies to the update and require commands which updates all dependencies of the listed packages, including those that are direct root requirements
  • Added scripts-descriptions key to composer.json to customize the description and document your custom commands
  • Added support for the uppercase NO_PROXY env var
  • Added support for COMPOSER_DEFAULT_{AUTHOR,LICENSE,EMAIL,VENDOR} env vars to pre-populate init command values
  • Added support for COMPOSER_MEMORY_LIMIT env var to make Composer set the PHP memory limit explicitly
  • Added support for simple strings for the bin
  • Added support for local fossil repositories
  • Added suggestions for alternative spellings when entering packages in init and require commands and nothing can be found
  • Fixed installed.json data to be sorted alphabetically by package name
  • Fixed compatibility with Symfony 4.x components that Composer uses