putout v7.20.3

fix

• (npmignore) add .spec.js
• (@putout/plugin-remove-useless-async) empty async function

feature

• (package) estree-to-babel v3.0.0
• (@putout/engine-parser) add ability to handle duplicate variables declaration
• (package) @putout/plugin-remove-unused-variables v2.0.0
• (@putout/test) is-correct-plugin
• (@putout/compare) add __nop
• (package) fullstore v3.0.0
• (@putout/eslint-config) function-paren-newline: multiline-arguments
• (eslint-plugin-putout) keyword-spacing: add support of for, for-of, for-await-of