• BREAKING CHANGE: The geoip2.record.* classes have been refactored to
  improve performance. This refactoring may break classes that inherit from
  them. The public API should otherwise be compatible.
• The network attribute was added to geoip2.record.Traits,
  geoip2.model.AnonymousIP, geoip2.model.ASN,
  geoip2.model.ConnectionType, geoip2.model.Domain,
  and geoip2.model.ISP. This is an ipaddress.IPv4Network or an
  ipaddress.IPv6Network. This is the largest network where all of the
  fields besides ip_address have the same value. GitHub #79.
• Python 3.3 and 3.4 are no longer supported.
• Updated documentation of anonymizer attributes - is_anonymous_vpn and
  is_hosting_provider - to be more descriptive.
• Added support for the user_count trait for the GeoIP2 Precision webservice.
• Added the static_ip_score attribute to geoip2.record.Traits for
  GeoIP2 Precision Insights. This is a float which indicates how static or dynamic
  an IP address is.