[Issue 21721] casting std.BigInts to built-in floating point types doesn't work without -preview=dip1000

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21721

--- Comment #4 from Dlang Bot <dlang-bot at dlang.rocks> ---
dlang/phobos pull request #8012 "merge stable" was merged into master:

- 40b34d3c1ff1d6bf8c75114c2c47d96c4864686f by Nathan Sashihara:
  Fix Issue 21721 - casting std.BigInts to built-in floating point types not
allowed in `@safe` code without -preview=dip1000

https://github.com/dlang/phobos/pull/8012

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