build status badge is obsolete in README.md

[aciba90]

The repo doesn't use Travis anymore for CI.

pycloudlib/README.md

Line 3 in 335c4a4

[](https://travis-ci.com/canonical/pycloudlib)

is obsolete.

[JP-sDEV]

Hi @aciba90, could I be assigned this task?

[TheRealFalcon]

@JP-sDEV , your comment is enough to signal that you are working on it. We'll consider it yours!