msys-core: allow non-ASCII characters in the window title

MSYS console emulation allows to set the window title of the console window
via 'OSC 2; title BEL' escape sequence. Unfortunately, this doesn't accept
non-ASCII characters for no apparent reason.

Drop the special filter for characters >= 127.

Signed-off-by: Karsten Blees <blees@dcon.de>
msys-core: allow changing the window icon via escape sequence

Allow changing the icon of the console window via escape sequence
'OSC 1; iconfile BEL' (similar to XTerm).

Example: echo -ne "\033]1;/etc/myicon.ico\007"

Signed-off-by: Karsten Blees <blees@dcon.de>
msys-core: bump the package version

And add the missing version 1.0.18-1 along the way, for the sake of
completeness.

Signed-off-by: Sebastian Schuberth <sschuberth@gmail.com>