• feat: #4220 #2941 #4196 improve pm2 serve for SPA - autoredirect requests to index.html if --spa
• feat: on pm2 show , display metric unit and divergent environment variables
• feat: #4157 tweak systemd script to auto restart PM2 in case of crash failure
• fix: #4212 on pm2 show, avoid crash when versioning comment is not present
• fix: #4171 fix pm2 list when small screen
• fix: #4197 fix pm2 unstartup for macOS
• fix: #2764 in pm2 monit, only display log of selected application
• fix: #2793 pm2 monit, rolling log buffer, avoid crash and performance issues
• fix: #4060 do not emit online when application is errored
• chore: remove nssocket in dependencies