Your requirements could not be resolved to an installable set of packages.
Problem 1
- vimeo/psalm[4.0.0, ..., 4.7.2] require nikic/php-parser ^4.10.1 -> found nikic/php-parser[v4.10.1, ..., v4.19.1] but the package is fixed to v5.0.2 (lock file version) by a partial update and that version does not match. Make sure you list it as an argument for the update command.
- vimeo/psalm[4.7.3, ..., 4.8.1] require nikic/php-parser ^4.10.5 -> found nikic/php-parser[v4.10.5, ..., v4.19.1] but the package is fixed to v5.0.2 (lock file version) by a partial update and that version does not match. Make sure you list it as an argument for the update command.
- vimeo/psalm[4.9.0, ..., 4.10.0] require nikic/php-parser ^4.12 -> found nikic/php-parser[v4.12.0, ..., v4.19.1] but the package is fixed to v5.0.2 (lock file version) by a partial update and that version does not match. Make sure you list it as an argument for the update command.
- vimeo/psalm[4.11.0, ..., 4.30.0, 5.0.0, ..., 5.7.7] require nikic/php-parser ^4.13 -> found nikic/php-parser[v4.13.0, ..., v4.19.1] but the package is fixed to v5.0.2 (lock file version) by a partial update and that version does not match. Make sure you list it as an argument for the update command.
- vimeo/psalm[5.8.0, ..., 5.13.1] require nikic/php-parser ^4.14 -> found nikic/php-parser[v4.14.0, ..., v4.19.1] but the package is fixed to v5.0.2 (lock file version) by a partial update and that version does not match. Make sure you list it as an argument for the update command.
- vimeo/psalm[5.14.0, ..., 5.24.0] require nikic/php-parser ^4.16 -> found nikic/php-parser[v4.16.0, ..., v4.19.1] but the package is fixed to v5.0.2 (lock file version) by a partial update and that version does not match. Make sure you list it as an argument for the update command.
- Root composer.json requires vimeo/psalm ^4.0|^5.0 -> satisfiable by vimeo/psalm[4.0.0, ..., 4.30.0, 5.0.0, ..., 5.24.0].
Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.