v2.1.0

• Close file if its file name is already changed even if there is no new data
  written: this check is made by interval timer.

v2.0.0

• newFilename should be overriden in subclass so it is no argument for
  constructor anymore.
• _final calls rather stream.end than close because of callback.

v1.2.0

• New streams are WriteStream so close method can be used instead end.

v1.1.0

• Clean up streams more carefully after they are not needed anymore.

v1.0.0

• Rewritten in Typescript.
• Node >= 6 is required.
• New syntax of import in plain Javascript.
• newFilename function has FileTimestampStream object as its first argument.
• Removed options property.

v0.6.0

• newFilename function has path as its first argument.

v0.5.0

• Implemented _writev method which corks file stream, then makes this writter
  fast enough.

v0.4.0

• Support import FileTimestampStream from 'file-timestamp-stream' syntax.
• Typescript: export options as FileTimestampStreamOptions.

v0.3.1

• Better clean up on destroy.

v0.3.0

• Implemented _final method which calls end on file stream.