Fails with version 0.16.3 of IntervalArithmetic #39

[mewilhel]

• Removes pi_interval syntax
• Fixes a broken test for expm1 (error was in the test not the expm1 function).

[dpsanders]

Great, thanks! Could you please bump the patch version in Project.toml as well?

[mewilhel]

Done!

[dpsanders]

Thanks a lot!