Combining intersection and union types leads to syntax error

[villermen]

Combining intersection and union types requires parentheses. This leads to a syntax error in Prettier.

https://loilo.github.io/prettier-php-playground/#N4IgDgTgpgLjCWUIHkwIPYDsDOIBcok8mMA6vACYwAW+AHAAwA0IMAhgEblW14AsLAK7YoAFU648AMzYAbES2zEA5rKgBFQehhR8M+VBZhqYAGpIlWfCDoA6PiBYwIbeLJUBhdAFtvbAAoAEv74zoKGIBwuAMZQAMowAJ5q1mBIALTRuCzQAI6C8ND+Lsp+enIKIMQiEDDFbKVs5QYAvixQFPAw6Cho8FiSoGzYMM0ibVWYYIKjeCAAPAD8xmAAOpjr0bLD2AAEAIK7wC3rm9vYewBCR+u7d7tEAG5sOrsAFPsAZJcAlAA+mEEslkuwAJJB0GlaoldgBeXaA4EAbnWJw2mBALSAA