Support a fix option #1
Description
We should support some fixer option (as we do with composer-normalize et al.).
This option then should call psalm with --alter.
The issues to be fixed are yet to be determined as I do not know how to handle them. A brief test with --issues=all did fix the issues in a rather cumbersome manner... it simply removed the whole code leading to the issue (or it did determine the method was not called and removed it therefore).