Use composer 2.0

[simnalamburt]

It's much faster!

References

• https://blog.packagist.com/composer-2-0-is-now-available/
• Add support for Composer v2 wikimedia/composer-merge-plugin#189

[lens0021]

wikimedia/composer-merge-plugin#184 is resolved

[lens0021]

MW 1.35.2 나오면 그때 가능할 것 같습니다

Your requirements could not be resolved to an installable set of packages.
 
   Problem 1
     - Root composer.json requires composer-plugin-api ^1.1, found composer-plugin-api[2.0.0] but it does not match the constraint.
   Problem 2
     - Root composer.json requires wikimedia/composer-merge-plugin 1.4.1 -> satisfiable by wikimedia/composer-merge-plugin[v1.4.1].
     - wikimedia/composer-merge-plugin v1.4.1 requires composer-plugin-api ^1.0 -> found composer-plugin-api[2.0.0] but it does not match the constraint.

[lens0021]

Unblocked as MW 1.35.2 has been released. https://lists.wikimedia.org/pipermail/mediawiki-announce/2021-April/000272.html

[lens0021]

Closed by 279a873