Release notes

0.9.0

Error compensation in the expr macro has been reworked.
Exponent range is introduced in the context.
Stability improvements.

0.8.0

Scalable conversion to decimal and from decimal base implemented: conversion and formatting functions now require constants cache.
Implementation of traits FromStr and Display and serde feature are now not available in no_std.
Mechanism of correct rounding has been removed from the expr! macro to increase its stablility.
Macro expr! now supports constants pi, e, ln_2, and ln_10 in expressions.
New public functions BigFloat::nan(), BigFloat::format(), new constant EXPONENT_BIT_SIZE.
Bug fixes and code refinements.
Improved portability and stability.

0.7.0

Improved integration tests.
Bug fixes and code refinement.
Improved portability.
Test coverage badge added.
Smallvec replaced with Vec.
Unsafe code revisited.

0.6.0

expr! macro implemented.
BigFloat stores information about its inexactness.
FromExt conversion trait added for BigFloat.

0.5.0

Release notes introduction.
Correct rounding of all arithmetic operations, math functions, and constant values.
Api compliance with https://rust-lang.github.io/api-guidelines/