Support ANSI escape sequence output on more Windows consoles

[HertzDevil]

Some consoles like Windows Terminal and the integrated one in Visual Studio Code already support ANSI escape sequences, but they are disabled on the system command prompt and Windows Powershell by default:

require "colorize"

puts "red".colorize.red.on_white # => <ESC>[31;107mred<ESC>[0m
# (where <ESC> is actually \x1B)

This patch enables them, so Colorize should work on a wider variety of consoles. This should work on Windows 10 build 1511 and above. It does not enable input sequences yet (e.g. ^[[A for cursor up whenever reading from STDIN).