Build problem caused by UInt128

when importing the library as a dependency:

```
error: the library 'BigDecimal' requires macos 10.13, but depends on the product 'UInt128' which requires macos 13.3; consider changing the library 'BigDecimal' to require macos 13.3 or later, or the product 'UInt128' to require macos 10.13 or earlier
```
