lgtm->CodeQL in README.md

README.md

@@ -2,10 +2,7 @@
 
 [![Downloads](https://pepy.tech/badge/k3d)](https://pepy.tech/project/k3d)
 [![Anaconda-Server Badge](https://anaconda.org/conda-forge/k3d/badges/downloads.svg)](https://anaconda.org/conda-forge/k3d)
-[![Build Status](https://travis-ci.org/K3D-tools/K3D-jupyter.svg)](https://travis-ci.org/K3D-tools/K3D-jupyter)
-[![Total Alerts](https://img.shields.io/lgtm/alerts/g/K3D-tools/K3D-jupyter.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/K3D-tools/K3D-jupyter/alerts/)
-[![Language Grade: JavaScript](https://img.shields.io/lgtm/grade/javascript/g/K3D-tools/K3D-jupyter.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/K3D-tools/K3D-jupyter/context:javascript)
-[![Language Grade: Python](https://img.shields.io/lgtm/grade/python/g/K3D-tools/K3D-jupyter.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/K3D-tools/K3D-jupyter/context:python)
+[![CodeQL](https://github.com/K3D-tools/K3D-jupyter/workflows/CodeQL/badge.svg)](https://github.com/K3D-tools/K3D-jupyter/actions)
 
 Jupyter notebook extension for 3D visualization.