Issue #3127141 by mondrake, longwave, alexpott, Neslee Canil Pinto, Suresh Prabhu Parkala, ravi.shankar: Use PHPUnit 9 for PHP 7.4+, while keeping support for PHPUnit 8.4 in PHP 7.3

Issue #3110972 by sanduhrs, jungle, raman.b, samiullah, alexpott, andypost, catch, xjm: Update easyrdf library to 1.0.0

Issue #3162403 by alexpott, mondrake: Upgrade symfony/phpunit-bridge to 5.1.6 to fix badly formed deprecation error message

Issue #3170675 by Neslee Canil Pinto: Replace http://cgit.drupalcode.org with https://git.drupalcode.org/project/drupal in the docs

Issue #3157434 by alexpott, jungle, dww, mondrake: Deprecate \Drupal\Tests\Traits\ExpectDeprecationTrait in favour of \Symfony\Bridge\PhpUnit\ExpectDeprecationTrait

Issue #3162479 by tedbow, Kristen Pol: Incorrect Drupal\Composer\VendorHardening namespace is used instead of  Drupal\Composer\Plugin\VendorHardening

Issue #3156998 by alexpott, mondrake, jibran: Using @requires extension_name in PHPUnit unit tests fails if extension is not present

Issue #3121847 by alexpott, joegraduate, greg.1.anderson, mmjvb: Composer project templates do not support drupal-custom-profile installer package type

Issue #3159735 by mstrelan: LegacyProject and RecommendedProject templates still reference Drupal 8 in the description for Drupal 9 branches

Revert "Issue #3133903 by longwave, jungle: Ensure all packages in composer.lock are considered for vendor hardening"

This reverts commit f0f4922f.

Issue #3133903 by longwave, jungle: Ensure all packages in composer.lock are considered for vendor hardening

Issue #2834525 by alexpott, kim.pepper, jummonk, joshua.roberson, Ruuds: Permission denied caused by race condition during ensureDirectory should be silenced

Issue #3138718 by sja112, longwave, dww, xjm, alexpott: Convert British English spellings to American English, for the umpteenth time

Issue #3101214 by mrinalini9, Sutharsan, Kristen Pol: Document that Core is implicitly allowed to scaffold files

Issue #3101210 by mrinalini9, Sutharsan, Kristen Pol, greg.1.anderson: Remove 'overwrite' as documented example in scaffold options

Issue #3134606 by greg.1.anderson, longwave, Kristen Pol, catch, jungle, alexpott: PHP Fatal error in 8.9.x / 9.0.x upgrade path

Issue #3134648 by alexpott, dww, greg.1.anderson, hussainweb, catch, xjm: Don't pin the composer/installers version in drupal/core-recommended

Issue #3032686 by longwave, jibran, xjm, alexpott, Berdir, amateescu: Remove references to unused packages in Drupal 9's vendor hardening

Issue #3126566 by greg.1.anderson, jungle, tedbow, hussainweb, Kristen Pol, alexpott: Allow Drupal to work with Composer 2

Issue #3103090 by greg.1.anderson, alexpott, jungle, ravi.shankar, dww, Mile23, larowlan: Avoid re-scaffolding unchanged files (and printing scaffold file information over and over)

Issue #3117857 by longwave, jungle, govind.maloo, Kristen Pol: [Symfony 5] The "Symfony\Component\Debug\BufferingLogger" class is deprecated since Symfony 4.4, use "Symfony\Component\ErrorHandler\BufferingLogger" instead

Issue #2455465 by stefan.r, Darren Oh, cosmicdreams, longwave, benjy, alexpott: Add mod_php7 check to htaccess and remove php5 code

Issue #3104015 by alexpott, TravisCarden, xjm, longwave, Spokje, catch, fgm, Berdir, tedbow, Bruno Vincent: Replace ZendFramework/* dependencies with their Laminas equivalents

Issue #3078671 by alexpott, Simon Peacock, greg.1.anderson, vuil, jungle, rodrigoaguilera, sam-elayyoub, mmjvb, karolrybak, catch: Pin behat/mink and behat/mink-selenium2-driver to use resolvable release