Set version to 0.7.0-rc0

Signed-off-by: Nicolaus Weidner <[email protected]>

Author: nicoweidner

Diff for: pyproject.toml

@@ -26,7 +26,7 @@ classifiers = [
 urls = {Homepage = "https://github.com/spdx/tools-python"}
 requires-python = ">=3.6"
 dependencies = ["ply", "rdflib", "click", "pyyaml", "xmltodict"]
-dynamic = ["version"]
+version = "0.7.0-rc0"
 
 [project.optional-dependencies]
 test = ["pytest"]