possible test failure in upcoming Julia version 1.5

[rfourquet]

A PkgEval run for a PR which changes the generated numbers for randn! indicates that the tests of this package might fail in Julia 1.5 (and on Julia current master). Apologies if this is a false positive.
cf. https://github.com/JuliaCI/NanosoldierReports/blob/7de24e455342298cbef56826b5827f0d7640d2c1/pkgeval/by_hash/b89e35c_vs_098ef24/logs/ProximalOperators/1.5.0-DEV-71a4a114c2.log

[lostella]

@rfourquet addressed, thanks!