chore(deps): bump acorn from 6.2.0 to 6.4.2#4

dependabot[bot] wants to merge 1 commit intomasterMoonW1nd/eslint-plugin-smart-sort:masterfrom

dependabot/npm_and_yarn/acorn-6.4.2MoonW1nd/eslint-plugin-smart-sort:dependabot/npm_and_yarn/acorn-6.4.2Copy head branch name to clipboard