Fix travis-slack integration once again.
Fix travis-slack integration once again.

The encrypted token doesn't work for unknown reason.

9livesdata/whylog,andrzejgorski/whylog,9livesdata/whylog,epawlowska/whylog,andrzejgorski/whylog,kgromadzki/whylog,epawlowska/whylog,kgromadzki/whylog,konefalg/whylog,konefalg/whylog