refactor: printer: apply putout rules on printer.ts

[coderaiser]

I'm working on code transformer putout. It has a lot built-in rules, so I want to suggest results of it's work on printer.ts using next rules:

{
    "rules": {
        "remove-debugger": "off",
        "remove-console": "off",
        "merge-if-statements": "off",
        "apply-destructuring/object": "on",
        "remove-nested-blocks": "on",
        "convert-object-assign-to-merge-spread": "on",
        "convert-for-each-to-for-of": "on",
        "convert-generic-to-shorthand": "on"
    }
}

I can disable some rules, If you think there is no need on recast codebase for them, anyways, I think this can make recast codebase a little bit better :). I'm using recast as a dependency and glad to make contribution back.

If it will be merged and when we decide on rule set, I can run putout on all codebase.