readline: rename `deDupeHistory` option

Renames `options.deDupeHistory` → `options.removeHistoryDuplicates` for
`readline.createInterface(options)`.

The option name `removeHistoryDuplicates` is preferable to the
semantically identical name `deDupeHistory` because "dedupe" (short for
"deduplication") is obscure and neologistic while
`removeHistoryDuplicates` is clear, though verbose.

Updates tests and documentation for this option accordingly.

PR-URL: https://github.com/nodejs/node/pull/11950
Ref: https://github.com/nodejs/node/pull/2982


Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: James M Snell <jasnell@gmail.com>