updating to version requirement to ~1.0 for latest cakephp/plugin-installer
updating to version requirement to ~1.0 for latest cakephp/plugin-installer

I forked, updated & tested on a fresh install of cakephp/app and no issues.  You can repeat & confirm by adding my forked version as a VCS repo to composer to a fresh install of cakephp/app:

    "repositories": [
        {
            "type": "vcs",
            "url": "https://github.com/pfuri/cakephp3-aclmanager"
        }
    ]
ivanamat/cakephp3-aclmanager