Fix Issue 13663 - Comparison of Tuples with floating point fields

[berni44]

This is a copy of #7301. I'm the original author, but as I deleted my old account, I can't do any changes there.

I rebased and replaced "issue 13663" by a link to bugzilla.

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Bugzilla references

Auto-close	Bugzilla	Severity	Description
✓	13663	normal	Comparison of Tuples with floating point fields

Testing this PR locally

If you don't have a local development environment setup, you can use Digger to test this PR:

dub run digger -- build "master + phobos#7748"