Update documents for !history command

[snuyanzin]

With updates of Jline3 several more features came for !history which are supported without doing anything:

1. !history -d - Print timestamps for each event (sqlline default for !history)
2. !history -f - Print full time date stamps in the US format
3. !history -E - Print full time date stamps in the European format
4. !history -i - Print full time date stamps in ISO8601 format
5. !history -n - Suppresses command numbers
6. !history -r - Reverses the order of the commands
7. !history [first] [last] - These optional arguments may be specified as a number or as a string. A negative number is used as an offset to the current history event number. A string specifies the most recent event beginning with the given string.

It makes sense to reflect this features in sqlline doc also.
May be it also makes sense to have configurable property for history flags to use as default for !history