Add dealerdirect/qa-tools when possible

Currently drupal/coder requires squizlabs/php_codesniffer <3.0 and that is a conflict. When that's lifted lets add the QA tools.

removed assignee

added Doing label

assigned to @jurgenhaas

moved from drupal-8-scaffold#13 (moved)

This tool is not well maintained and leads to unresolvable dependencies. But we can identify individual tools that we want to install instead:

• dealerdirect/phpcodesniffer-composer-installer
• phploc/phploc
• phpmd/phpmd
• phpunit/phpunit
• sebastian/phpcpd
• squizlabs/php_codesniffer

mentioned in commit b0a6ce16

Most of them we already had included, added the remaining ones.

closed

removed Doing label