Update phpunit/phpunit requirement from ^6.0 || ^7.0 to ^7.0 || ^8.0#16

yoanm merged 4 commits intomasteryoanm/php-jsonrpc-http-server-openapi-doc-sdk:masterfrom

dependabot/composer/phpunit/phpunit-tw-6.0or-tw-7.0or-tw-8.0yoanm/php-jsonrpc-http-server-openapi-doc-sdk:dependabot/composer/phpunit/phpunit-tw-6.0or-tw-7.0or-tw-8.0Copy head branch name to clipboard