[PATCH] fix: use values that are representable as double in test

[PATCH] fix: use values that are representable as double in test

From cb09f8545ce48f5f2f0843110bb814ce33c08688 Mon Sep 17 00:00:00 2001
Origin: vendor, https://gitlab.dune-project.org/core/dune-common/-/merge_requests/1329

This should fix a [test failure on i386][1]:

```
lrutest: ./dune/common/test/lrutest.cc:29: void lru_test(): Assertion `lru.front() == 1.3 && lru.back() == 2.0' failed.
```

  [1]: https://buildd.debian.org/status/fetch.php?pkg=dune-common&arch=i386&ver=2.9.0-5&stamp=1703605683&raw=0

Gbp-Pq: Name 0002-fix-use-values-that-are-representable-as-double-in-t.patch