i got this warn when i type npm install how to fix them
npm WARN deprecated browserslist@2.11.3: Browserslist 2 could fail on reading Browserslist >3.0 config used in other tools.
npm WARN deprecated boom@2.10.1: This version is no longer maintained. Please upgrade to the latest version.
npm WARN deprecated hoek@2.16.3: This version is no longer maintained. Please upgrade to the latest version.
npm WARN deprecated cryptiles@2.0.5: This version is no longer maintained. Please upgrade to the latest version.