Update badges for new mitogen-hq organisation

Moving the repository from dw/mitogen to mitogen-hq/mitogen has confused a few external services. This is part of the cleanup

README.md

@@ -5,8 +5,8 @@
 
 ![](https://i.imgur.com/eBM6LhJ.gif)
 
-[![Total alerts](https://img.shields.io/lgtm/alerts/g/dw/mitogen.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/dw/mitogen/alerts/)
+[![Total alerts](https://img.shields.io/lgtm/alerts/g/mitogen-hq/mitogen.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/mitogen-hq/mitogen/alerts/)
 
-[![Build Status](https://travis-ci.org/dw/mitogen.svg?branch=master)](https://travis-ci.org/dw/mitogen)
+[![Build Status](https://api.travis-ci.com/mitogen-hq/mitogen.svg?branch=master)](https://api.travis-ci.com/mitogen-hq/mitogen)
 
-[![Pipelines Status](https://dev.azure.com/dw-mitogen/Mitogen/_apis/build/status/dw.mitogen?branchName=master)](https://dev.azure.com/dw-mitogen/Mitogen/_build/latest?definitionId=1?branchName=master)
+[![Pipelines Status](https://dev.azure.com/mitogen-hq/mitogen/_apis/build/status/mitogen-hq.mitogen?branchName=master)](https://dev.azure.com/mitogen-hq/mitogen/_build/latest?definitionId=1&branchName=master)