chore(deps): update composer/composer requirement from ^1.10 to ^2.0 in /packages/php

[dependabot]

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

Release notes

Sourced from composer/composer's releases.

2.0.4

• Fixed check-platform-req command not being clear on what packages are checked, and added a --lock flag to explicitly check the locked packages
• Fixed config & create-project adding of repositories to make sure they are prepended as order is much more important in Composer 2, also added a --append flag to config to restore the old behavior in the unlikely case this is needed
• Fixed curl downloader failing on old PHP releases or when using self-signed SSL certificates
• Fixed Bitbucket API authentication issue

Changelog

Sourced from composer/composer's changelog.

[2.0.4] 2020-10-30

• Fixed check-platform-req command not being clear on what packages are checked, and added a --lock flag to explicitly check the locked packages
• Fixed config & create-project adding of repositories to make sure they are prepended as order is much more important in Composer 2, also added a --append flag to config to restore the old behavior in the unlikely case this is needed
• Fixed curl downloader failing on old PHP releases or when using self-signed SSL certificates
• Fixed Bitbucket API authentication issue

[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• Fixed bug in outdated command where dev packages with branch-aliases where always shown as being outdated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• Fixed new --locked option being missing from outdated command, for checking outdated packages directly from the lock file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

... (truncated)

Commits

• 4053eab Release 2.0.4
• 5ad3d5a Update changelog
• da73ef1 Merge branch '1.10'
• f303419 Update changelog
• 28e591d Merge pull request #9387 from studioromeo/fix-git-non-master-default-failing-...
• 2ced7b0 Fix git init -b being unavailable for older versions
• 52f98fd Merge branch '1.10'
• 7f936d7 Ignore failures on preg_match for user supplied regex
• 36a9c47 Fix typo from a637072058c27d2fe4ccc13b71f81e025350a009
• a637072 Fix canUseCurl logic to allow local_cert/local_pk to reach curl, refs #9384
• Additional commits viewable in compare view

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