Issue #3076684 by Spokje, andypost, longwave, paulocs, Mile23, KapilV, greg.1.anderson: Remove deprecated vendor cleanup scripts

Issue #3198340 by alexpott, xjm, Mile23, cilefen, mmjvb, catch, Mixologic, effulgentsia, mfb, longwave, larowlan, greg.1.anderson, Warped, quietone: Strict constraints in drupal/core-recommended make it harder for Composer-managed sites to apply their own security updates when a core update is not available

Issue #3088730 by Spokje, anmolgoyal74, ankithashetty, Mile23, longwave, naresh_bavaskar, greg.1.anderson, Mixologic, klausi: Include 'composer' directory in phpcs scans

Issue #3186364 by effulgentsia, longwave, xjm, jungle, alexpott, greg.1.anderson: Allow pre-release dependencies in Drupal pre-release milestones

Issue #3108262 by Mile23, andypost, Spokje, Pooja Ganjage, piggito, Chi, AdamPS, greg.1.anderson: Support directories other than vendor in the Hardening Plugin

Issue #3098281 by greg.1.anderson, alexpott, heddn, Mile23, xjm, jungle, longwave: Ensure that 'composer update' evaluates dependencies using the correct PHP version

Issue #3179875 by greg.1.anderson, Mixologic: Path repositories need to be listed first for Composer 2

Issue #3128631 by andypost, longwave, hussainweb, ayushmishra206, greg.1.anderson, xjm, catch, Mixologic, jungle, Gábor Hojtsy: Update dependencies composer/composer ^2 and composer/semver to ^3

Issue #3135247 by greg.1.anderson, alexpott, ridhimaabrol24, Mixologic, tedbow, xjm, catch, jwilson3, longwave: Composer's "prefer-stable" setting cannot be relied on to produce a stable release

Issue #3158281 by paulocs, kiamlaluno, Hardik_Patel_12, greg.1.anderson: Unused local variables from ScaffoldTest.php file

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

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

Issue #3123933 by greg.1.anderson, alexpott, longwave, xjm: Determine whether ComposerProjectTemplatesTest is testing the internet, and if it is, avoid that

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 #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 #3127013 by greg.1.anderson, jungle, andrey.troeglazov, andypost, Mixologic, Mile23: Remove wikimedia/composer-merge-plugin

Issue #3103529 by alexpott, mcdruid, Chris Burge, greg.1.anderson, rfay, anavarre, catch, Gábor Hojtsy: Drupal 8.8.1+ and 9 can fail to install in the web browser due to cache pollution

Revert "Issue #3103529 by mcdruid, alexpott, Chris Burge, greg.1.anderson, rfay, anavarre, Gábor Hojtsy: Drupal 8.8.1+ and 9 can fail to install in the web browser due to cache pollution"

This reverts commit 8a23417a.

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

Issue #3103529 by mcdruid, alexpott, Chris Burge, greg.1.anderson, rfay, anavarre, Gábor Hojtsy: Drupal 8.8.1+ and 9 can fail to install in the web browser due to cache pollution

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

Issue #3115624 by martijn.cuppens, jungle, JeroenT, greg.1.anderson, Mile23: Scaffolding: Only add root files to gitignore

Issue #3103918 by greg.1.anderson, Mile23, alexpott, Mixologic, catch: [policy + patch] Decide on backwards compatibility policy for Composer plugins in Drupal 8

Issue #3086644 by Mile23, alexpott, Mixologic, greg.1.anderson, jibran: LegacyProject composer templates wrongly reference 8.x + fix test coverage

Issue #3106075 by Krzysztof Domański, heddn, Gábor Hojtsy, xjm, catch, mondrake, larowlan, greg.1.anderson: Bump minimum PHP for Drupal 9 to PHP 7.3

Issue #3104922 by greg.1.anderson, Mile23, alexpott: Guard against changes to Scaffold Plugin that might cause upgrade problems

Issue #3104473 by Manuel Garcia, Mile23, greg.1.anderson, longwave, xjm: Use version of guzzlehttp/guzzle ^6.5.2

Issue #3091418 by Manuel Garcia, jibran, tedbow, TravisCarden, xjm, greg.1.anderson, Gábor Hojtsy, catch, Mile23, Berdir, hussainweb: Update composer dependencies on 9.0.x

Issue #3090906 by alexpott, greg.1.anderson, ravi.shankar, xjm, Mixologic, Mile23: self.version in metapackages considered harmful

Issue #3072337 by Mile23, Mixologic, greg.1.anderson, alexpott: Add test to validate composer.json files

Issue #3075785 by alexpott, andypost, mondrake, Mixologic, greg.1.anderson: Update composer/composer to ^1.9.1

Revert "Revert "Issue #3087482 by Mile23, greg.1.anderson, AaronMcHale, johndevman, mbaynton, alexpott: Add 'next steps' info to Composer installation output""

This reverts commit 32b0bacf.

Revert "Issue #3087482 by Mile23, greg.1.anderson, AaronMcHale, johndevman, mbaynton, alexpott: Add 'next steps' info to Composer installation output"

This reverts commit b547ffe6.

Issue #3087482 by Mile23, greg.1.anderson, AaronMcHale, johndevman, mbaynton, alexpott: Add 'next steps' info to Composer installation output

Issue #3090684 by Mixologic, greg.1.anderson, opdavies, alexpott: Rename drupal/dev-dependencies and drupal/pinned-dev-dependencies

Issue #3087626 by greg.1.anderson, Mixologic, jibran, Mile23, alexpott, xjm: Convert drupal/core-recommended & c. into a subtree split

Issue #3088369 by mikelutz, alexpott, Berdir, Gábor Hojtsy, andypost, martin107, greg.1.anderson, dawehner, jibran, Wim Leers, Mile23, catch: Update Drupal 9 to Symfony 4.4-dev

Issue #3088448 by alexpott, greg.1.anderson, Mixologic, Mile23: Remove bin/composer from composer.lock file