chore: bump version to 0.9.0

Author: fvaleye

pyproject.toml

@@ -1,7 +1,7 @@
 [project]
 name = "tracarbon"
 authors = [{name = "Florian Valeye", email = "fvaleye@github.com"}]
-version = "0.8.0"
+version = "0.9.0"
 description = "Tracarbon is a Python library that tracks your device's energy consumption and calculates your carbon emissions."
 readme = "README.md"
 license = "Apache-2.0"