Build(deps-dev): Update composer/composer requirement from ^1.10.5 to ^2.0.3

[dependabot-preview]

Updates the requirements on composer/composer to permit the latest version.

Release notes

Sourced from composer/composer's releases.

2.0.3

• Fixed bug in outdated command where dev packages with branch-aliases where always shown as being outdated
• Fixed issue in lock file interoperability with composer 1.x when using dev-master as xxx aliases
• Fixed new --locked option being missing from outdated command, for checking outdated packages directly from the lock file
• Fixed a few debug/error reporting strings

Changelog

Sourced from composer/composer's changelog.

[2.0.3] 2020-10-28

• Fixed bug in outdated command where dev packages with branch-aliases where always shown as being outdated
• Fixed issue in lock file interoperability with composer 1.x when using dev-master as xxx aliases
• Fixed new --locked option being missing from outdated command, for checking outdated packages directly from the lock file
• Fixed a few debug/error reporting strings

[2.0.2] 2020-10-25

• Fixed regression handling composer show -s in projects where no version can be guessed from VCS
• Fixed regression handling partial updates/require when a lock file was missing
• Fixed interop issue with plugins that need to update dist URLs of packages, see docs if you need this

[2.0.1] 2020-10-24

• Fixed crash on PHP8

[2.0.0] 2020-10-24

• Fixed proxy handling issues when combined with our new curl-based downloader
• Fixed solver bug resulting in endless loops in some cases
• Fixed solver output being extremely long due to learnt rules
• Fixed solver bug with multi literals
• Fixed a couple minor regressions

[2.0.0-RC2] 2020-10-14

• Breaking: Removed OperationInterface::getReason as the data was not accurate
• Added automatic removal of packages which are not required anymore whenever an update is done, this will purge packages previously left over by partial updates and require/remove
• Added shorthand aliases -w for --with-dependencies and -W for --with-all-dependencies on update/require/remove commands
• Added COMPOSER_DEBUG_EVENTS=1 env var support for plugin authors to figure out which events are triggered when
• Added setCustomCacheKey to PreFileDownloadEvent and fixed a cache bug for integrations changing the processed url of package archives
• Added Composer\Util\SyncHelper for plugin authors to deal with async Promises more easily
• Added $composer->getLoop()->getHttpDownloader() to get access to the main HttpDownloader instance in plugins
• Added a non-zero exit code (2) and warning to remove command when a package to be removed could not be removed
• Added --apcu-autoloader-prefix (or --apcu-prefix for dump-autoload command) flag to let people use apcu autoloading in a deterministic output way if that is needed
• Fixed version guesser to look at remote branches as well as local ones
• Lots of minor bug fixes and improvements

[2.0.0-RC1] 2020-09-10

• Added more advanced filtering to avoid loading all versions of all referenced packages when resolving dependencies, which should reduce memory usage further in some cases
• Added support for many new lib-* packages in the platform repository and improved version detection for some ext-* and lib-* packages
• Added an --ask flag to create-project command to make Composer prompt for the install dir name, useful for project install instructions
• Added support for tar in artifact repositories
• Added a cache-read-only config option to make the cache usable in read only mode for containers and such
• Added better error reporting for a few more specific cases
• Added a new optional available-package-patterns attribute for v2-format Composer repositories, see UPGRADE for details
• Fixed more PHP 8 compatibility issues
• Lots of minor bug fixes for regressions

Commits

• f7eebdd Release 2.0.3
• ec5f020 Update changelog
• 90a6aa7 Make sure we compare packages to their latest without aliases, fixes #9357
• 86072a7 Merge branch '1.10'
• 04e5d72 Add docs
• ff74d0e Fix lock file generation with dev-master aliases to be compatible with Compos...
• 44dc3c2 Try and sign phars on releases, refs #5155
• 568d920 Fix tests
• 881ec8c Use httpdownloader/curl to process install notifications
• d699e6b Make sure global plugins are described as such in loading output, fixes compo...
• Additional commits viewable in compare view

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Superseded by #225.