wscons should support bright colour SGR sequences
Most terminal emulator software supports the eight ISO/ANSI-standardised SGR colour attributes: 30-37 and 40-47, for foreground and background respectively. Many xterm-compatible terminals support an additional set of SGR sequences for the "bright" or "bold" versions of these colours: 90-97 and 100-107. Given the underlying
vgatext code provide support for both low and high intensity versions of the eight standard colours, we should support these SGR attribute sequences as well.