Error with Truncated Chernoff quantiles; missing function (newton)

[GBarnsley]

Getting the following error from this code:

using Distributions
quantile(truncated(Chernoff(), lower = 0.1), 0.75)

ERROR: UndefVarError: `newton` not defined in `Distributions`

Seems to be due to the use of newton in this file but I'm not familiar enough with the ecosystem to suggest where newton is supposed to be from.