Fixup some psalm return types - #356

The strategy configuration was canceled because "windows-tests._8_5" failed

Process completed with exit code 1.

Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires vimeo/psalm ^6 -> satisfiable by vimeo/psalm[6.0.0, ..., 6.16.1]. - danog/advanced-json-rpc[v3.1.0, ..., v3.1.1] require phpdocumentor/reflection-docblock ^4.0.0 || ^5.0.0 -> satisfiable by phpdocumentor/reflection-docblock[4.0.0, ..., 4.3.4, 5.0.0, ..., 5.6.7]. - felixfbecker/advanced-json-rpc[v3.1.0, ..., v3.1.1] require phpdocumentor/reflection-docblock ^4.0.0 || ^5.0.0 -> satisfiable by phpdocumentor/reflection-docblock[4.0.0, ..., 4.3.4, 5.0.0, ..., 5.6.7]. - danog/advanced-json-rpc[v3.1.2, ..., v3.2.2] require phpdocumentor/reflection-docblock ^4.3.4 || ^5.0.0 -> satisfiable by phpdocumentor/reflection-docblock[4.3.4, 5.0.0, ..., 5.6.7]. - felixfbecker/advanced-json-rpc[v3.1.2, ..., v3.2.1] require phpdocumentor/reflection-docblock ^4.3.4 || ^5.0.0 -> satisfiable by phpdocumentor/reflection-docblock[4.3.4, 5.0.0, ..., 5.6.7]. - danog/advanced-json-rpc v3.2.3 requires phpdocumentor/reflection-docblock ^4.3.4 || ^5.0.0 || ^6 -> satisfiable by phpdocumentor/reflection-docblock[4.3.4, 5.0.0, ..., 5.6.7, 6.0.0, 6.0.1, 6.0.2, 6.0.3]. - phpdocumentor/reflection-docblock[4.0.0, ..., 4.3.4] require php ^7.0 -> your php version (8.3.31) does not satisfy that requirement. - phpdocumentor/reflection-docblock[5.0.0, ..., 5.1.0] require php ^7.2 -> your php version (8.3.31) does not satisfy that requirement. - phpdocumentor/reflection-docblock[5.2.0, ..., 5.6.5] require webmozart/assert ^1.9.1 -> satisfiable by webmozart/assert[1.9.1, ..., 1.12.1] from composer repo (https://repo.packagist.org) but webmozart/assert dev-dd772da475ddaf970ef5710fe17838203beaa850 is the root package and cannot be modified. See https://getcomposer.org/dep-on-root for details and assistance. - phpdocumentor/reflection-docblock[5.6.6, ..., 5.6.7, 6.0.0, ..., 6.0.3] require webmozart/assert ^1.9.1 || ^2 -> satisfiable by webmozart/assert[1.9.1, ..., 1.12.1, 2.0.0-beta, ..., 2.3.0] from composer repo (https://repo.packagist.org) but webmozart/assert dev-dd772da475ddaf970ef5710fe17838203beaa850 is the root package and cannot be modified. See https://getcomposer.org/dep-on-root for details and assistance. - vimeo/psalm[6.0.0, ..., 6.5.1] require felixfbecker/advanced-json-rpc ^3.1 -> satisfiable by felixfbecker/advanced-json-rpc[v3.1.0, ..., v3.2.1]. - vimeo/psalm[6.6.0, ..., 6.16.1] require danog/advanced-json-rpc ^3.1 -> satisfiable by danog/advanced-json-rpc[v3.1.0, ..., v3.2.3].

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