chore: update pipenv tests

Python 3.10 is now the minimum

Author: sgaist

integration/packagers/pipenv_default_test.go

@@ -91,7 +91,7 @@ func pipenvTestDefault(t *testing.T, context spec.G, it spec.S) {
 			))
 			Expect(logs).To(ContainLines(
 				// Due to Pipfile requirement
-				MatchRegexp(`    Installing CPython 3.9.\d+`),
+				MatchRegexp(`    Installing CPython 3.10.\d+`),
 			))
 
 			container, err = docker.Container.Run.

integration/packagers/testdata/pipenv/default_app/Pipfile

@@ -15,4 +15,4 @@ coverage = "*"
 flask-testing = "*"
 
 [requires]
-python_version = "3.9"
+python_version = "3.10"