long-decimal goes to another alpha-version.
Experimental support for more advanced rounding has been added with the method of LongDecimal called round_to_allowed_remainders().

This release can be considered stable already for +, -, * and / operations, sqrt, exp, log etc, but for calculation of powers with base close to 1 and exponent very big the operation is too slow. The newly added method round_to_allowed_remainders has not yet been tested extensively.

Therefore and for the lack of external documentation (LaTeX or PDF beyond rdoc-comments) about the algorithms being used this version is still considered Alpha, not Beta.