test_pkurtosis fails on Fedora

[igor-raits]

failures:
---- univariate_::test::test_pkurtosis stdout ----
thread 'univariate_::test::test_pkurtosis' panicked at 'assertion failed: `(left == right)`
  left: `0.7794232987312584`,
 right: `0.7794232987312579`', src/univariate_.rs:220:9
note: Run with `RUST_BACKTRACE=1` environment variable to display a backtrace.
failures:
    univariate_::test::test_pkurtosis
test result: FAILED. 24 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out

Let me know what other information do you need. Thanks!