This update for ntpd-rs fixes the following issues:

- Update to version 1.6.0
  Added
  * Support draft versions of NTPv5 with configuration changes.
  * Allow disabling ntp versions in the server.
  Changed
  * NTPv5 draft support now targets draft 4.
  * Time jumps now emit warnings.
  * Updated dependencies.
  Fixed
  * Fixed a crash in force-sync when using many servers.
  * Fixed root dispersion of the server not properly updating over
    time.
  * Fixed a bug in handling unsigned ntp deny messages.

- Update to version 1.5.0
  Added
  * Support for PPS based sources (this support can be disabled
    with a compile flag for now).
  * Per source configuration of poll intervals.
  * Allow setting a custom reference id for stratum 1 servers.
  Changed
  * Our algorithm can now handle periodic sources.
  * ntpd-rs runs single-threaded when only configured as a client,
    servers still run multithreaded.
  * The reference timestamp field is now set to the truncated
    receive timestamp instead of being zero.
  * Support of rustls 0.21 and 0.22 is removed.
  * Certificate validation is now done through
    rustls-platform-verifier, following platform certificate
    validation more closely.
  * Updated dependencies
  Fixed
  * Fixed parsing of IPv6 addresses.
  * Fixed incorrect display of date in force-sync command.
  * Fixed a client denial of service vulnerability with zero-sized
    NTS cookies.
  * Fixed a client denial of service vulnerability with NTS cookies
    that are too large.

- Update to version 1.4.0
  Added
  * Support for GPS based sources via a GPSd socket.
  * Added a setting to allow disabling of colors in our logs
    (observability.ansi-colors)
  Changed
  * Fallback to V4 should V5 not work for some reason (if NTPv5 is
    enabled)
  * Make the NTP version of a source configurable.
  * We now support rustls from 0.21 and up, to allow compilation
    on more targets.
  Fixed
  * Force sync did not work when a single source was configured.
  * Fix incorrect indexing in decode of ReferenceIdRequest for
    NTPv5 messages.

- Update to version 1.3.1
  * Updated dependencies. Includes fixes for RUSTSEC-2024-0399.

- Update to version 1.3.0
  Added
  * Added force-sync command to ntp-ctl to help with getting a
    decent initial time if the clock is far away from reality.
  * Added information on NTS to the ntp-ctl status overview.
  Changed
  * Made the logs a little less chatty.
  * Updated dependencies.