Bump version from 0.3.0 to 0.3.1

Author: scarrazza

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "poetry.core.masonry.api"
 
 [tool.poetry]
 name = "qibo"
-version = "0.3.0"
+version = "0.3.1"
 description = "A framework for quantum computing with hardware acceleration."
 authors = ["The Qibo team"]
 license = "Apache License 2.0"