chore(pyproject.toml): release 4.0.0-rc1

Signed-off-by: Vaughn Dice <vdice@akamai.com>

Author: vdice

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "spin-sdk"
-version = "4.0.0"
+version = "4.0.0-rc1"
 description = "Python SDK for Spin"
 readme = "README.md"
 license-files = [ "LICENSE" ]