v6.2.1

Thanks to @shodan8192 for finding and fixing a memory leak on unix systems!

• docs: fix link to parser docs (f2285d0)
• docs: regenerate docs (eb053db)
• chore: change to new parser packages and upgrade (fix builds) (#1562) (d829ada), closes #1562
• chore: drop node 4 EOL, add node 10 🎉 (#1556) (e1998b3), closes #1556
• chore(package): update conventional-changelog-cli to version 2.0.0 (#1571) (1bf70ae), closes #1571
• chore(package): update package specs (#1557) (4ed5182), closes #1557
• chore(package): upgrade packages (46d798d)
• fix: a few warnings and deprecations (#1558) (a250f09), closes #1558
• fix: build isn't using the right version on 32x (#1564) (f9953f2), closes #1564
• fix: memory leak in unix serialport poller (#1572) (9006bd6), closes #1572