[Issue 23993] std.algorithm.maxElement no longer works with array of BigInt

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=23993

--- Comment #1 from hsteoh at qfbox.info ---
git bisect reveals the offending commit:
b818901e6351d8fb8ef75cba11df3278a0a25bcf

Offending PR: https://github.com/dlang/phobos/pull/8734

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