universe: python: Update to 0.2

Update some API references that had fallen out of use.

Notably this no longer ran, since docker.#Run now asks for an "input" not an "image," alpine.#Image became alpine.#Build and you have to reference its output.

Remove a FIXME -- now copies the inline script to the container as a file rather than executing it with python -c.

Add tests

Signed-off-by: Adam Smith <adamsmith@nottheeconomist.com>

pkg/universe.dagger.io/python/test/test.bats

@@ -0,0 +1,9 @@
+setup() {
+    load '../../bats_helpers'
+
+    common_setup
+}
+
+@test "python" {
+    dagger "do" -p ./test.cue test
+}