Remove python 3.7 and 3.8

Author: tarzzz

buildpack.toml

@@ -4,7 +4,7 @@ api = "0.7"
   id = "paketo-buildpacks/cpython"
   name = "Paketo Buildpack for CPython (Plotly fork)"
   sbom-formats = ["application/vnd.cyclonedx+json", "application/spdx+json", "application/vnd.syft+json"]
-  version = "5.4"
+  version = "5.9.0"
 
   [[buildpack.licenses]]
     type = "Apache-2.0"