Disable "hybrid stabilizer" by default

This release (only) disables "hybrid stabilizer" mode option by default.

sha1sum results:
f7cdd8248ee07afa88c691c69bb1790bafb99665 cirqqrack-0.8.3-py3-none-any.whl
6c6c455fe94a79072b6e8a76aa2c819a8d27cfcd cirqqrack-0.8.3.tar.gz