add readme to pyproject so pypi will look better

pyproject.toml

@@ -6,7 +6,8 @@ build-backend = "poetry.core.masonry.api"
 name = "ur_py_ctl"
 version = "0.1.5"
 description = "Python wrapper around URScript (for Universal Robotics robots)."
-authors = ["Anton Tetov <anton.johansson@control.lth.se>"]
+readme = "README.md"
+authors = ["Anton Tetov <anton@tetov.se>"]
 repository = "https://gitlab.control.lth.se/robotlab/ur_py_ctl"
 
 [tool.poetry.dependencies]