Fix shield for CI status

The old shield was still pointing to travis, this patch changes
it to use the Drone CI shield shield.

The link is to the status for all branches, I can't find a link
specifically to the master branch status, the links from the branch
status page goes to individual build numbers.

1 files changed, 1 insertions, 1 deletions

diff --git a/README.md b/README.md
index 42309761..c2e682f7 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 RDFLib
 ======
-[![Build Status](https://travis-ci.org/RDFLib/rdflib.png?branch=master)](https://travis-ci.org/RDFLib/rdflib)
+[![Build Status](https://drone.rdflib.ashs.dev/api/badges/RDFLib/rdflib/status.svg?ref=refs/heads/master)](https://drone.rdflib.ashs.dev/RDFLib/rdflib/branches)
 [![Coveralls branch](https://img.shields.io/coveralls/RDFLib/rdflib/master.svg)](https://coveralls.io/r/RDFLib/rdflib?branch=master)
 [![GitHub stars](https://img.shields.io/github/stars/RDFLib/rdflib.svg)](https://github.com/RDFLib/rdflib/stargazers)
 [![PyPI](https://img.shields.io/pypi/v/rdflib.svg)](https://pypi.python.org/pypi/rdflib)