Support for composer 2.0

[boesing]

Q	A
Documentation	no
Bugfix	no
BC Break	no
New Feature	yes
RFC	no
QA	no

Description

Initial support for composer v2

[weierophinney]

Do we need any additional jobs for Travis to test this, or will this be enough?

[boesing]

@weierophinney Functionality is untouched, I dont think that we need additional travis tests.
We are checking for lowest and latest dependencies which should be enough.

EDIT: Okay, we have to touch functionality...

[boesing]

This PR would pass CI after merging #5
If we do not want to merge #5, I'll re-write the unit tests in here to support new composer v2 methods.

[snapshotpl]

After composer update I have downloaded released versions with this change and it's raise an error:

Fatal error: Uncaught TypeError: Argument 1 passed to Laminas\ApiTools\AssetManager\AssetInstaller::__invoke() must implement interface Composer\Package\PackageInterface, instance of Composer\Installer\PackageEvent given, called in /var/www/vendor/laminas-api-tools/api-tools-asset-manager/src/Plugin.php on line 109 and defined in /var/www/vendor/laminas-api-tools/api-tools-asset-manager/src/AssetInstaller.php:61
Stack trace:
#0 /var/www/vendor/laminas-api-tools/api-tools-asset-manager/src/Plugin.php(109): Laminas\ApiTools\AssetManager\AssetInstaller->__invoke(Object(Composer\Installer\PackageEvent))
#1 /var/www/vendor/laminas-api-tools/api-tools-asset-manager/src/Plugin.php(74): Laminas\ApiTools\AssetManager\Plugin->Laminas\ApiTools\AssetManager\{closure}()
#2 [internal function]: Laminas\ApiTools\AssetManager\Plugin->onPostAutoloadDump(Object(Composer\Script\Event))
#3 phar:///usr/local/bin/composer/src/Composer/EventDispatcher/EventDispatcher.php(164): call_user_func(Array, Object(Composer\Script\Event))
#4 phar:///usr/ in /var/www/vendor/laminas-api-tools/api-tools-asset-manager/src/AssetInstaller.php on line 61

I'm using composer 1.10.7