Update typings/xterm.d.ts
Update typings/xterm.d.ts

Co-authored-by: Daniel Imms <dc82f0771bae215e127cc57ad3dec0d9274fe4e3@users.noreply.github.com>
Tyriar/xterm.js,xtermjs/xterm.js,xtermjs/xterm.js,Tyriar/xterm.js,xtermjs/xterm.js,xtermjs/xterm.js,Tyriar/xterm.js,Tyriar/xterm.js,Tyriar/xterm.js,xtermjs/xterm.js