v0.2.9: Merge pull request #14 from jon4hz/main

Fix ToSignificant() output on very small numbers

v0.2.8: Merge pull request #12 from laojianzi/fix/to-fixed-decimal

fix: ToFixed fractional part discard problem

v0.2.7: Merge pull request #9 from miraclesu/fix/price-invert

fix: price invert

v0.2.6: Merge pull request #5 from miraclesu/fix/price-impact

fix: best trade price impact issue

v0.2.5: Merge pull request #4 from miraclesu/fix/decimal-round

fix: fraction decimal rounding