🔧 update RELEASE instructions (#307)

Author: MiWeiss

RELEASE

@@ -3,9 +3,16 @@ How to release
 
 * Update CHANGELOG
 * Update version in __init__.py
-* git tag -a 'vX'
-* merge in branch latest
-* Send the package on pypi
+* Commit and open PR on Github to see that all tests pass
+* Check out master locally
+* Build wheel
     python setup.py sdist upload
-* tick the doc version on readthedocs
-* Update version in __init__.py
+* Check long description
+    twine check dist/*
+* Upload to pypi-test
+    twine upload --repository testpypi dist/*
+* Upload to pypi
+    twine check dist/*
+* Create release on Github and Merge PR
+* Verify docs are automatically updated
+