Update the copyright date, and bump version to 1.15

Update to version 1.14

This version has a bug fix for properly setting the websocket to closed when it
is closed abnormally.

Set version to 1.13.

This version is mostly testing changes. However, the automatic reconnection
behavior of websockets was found to cause infinite loops in situations that
should be relatively normal for error occurances. The behavior seemed
unnecessary, so it was removed.

Set version to 1.12.

Merge fix for 32-bit emacs.

Fix is from the ELPA repository, commit
42e566c946db8fc8b170a13c3bdff60cbf2807b0, by Paul Eggert.

Original commit message:
Port websocket to bleeding-edge 32-bit Emacs

    Problem reported by Stefan Monnier (Bug#31118).
    * packages/websocket/websocket.el (websocket-to-bytes):
    Do not assume that #xffffffff is a valid fixnum.

Update version to 1.9.

Update version to 1.8

Fix issue with handling multibyte characters.

Added new method `websocket-frame-text' to return the payload of a frame
as utf-8 text.

Added a test to make sure message masked aren't multibyte.

Changed the text in the functional test to multibyte to help test
against these kinds of issues.