fix(deps): declare our dependency on bazel_skylib (#1001)

examples/multi_python_versions/WORKSPACE

diff --git a/examples/multi_python_versions/WORKSPACE b/examples/multi_python_versions/WORKSPACE
index 9a6676e..698bce8 100644
--- a/examples/multi_python_versions/WORKSPACE
+++ b/examples/multi_python_versions/WORKSPACE
@@ -1,16 +1,5 @@
 workspace(name = "rules_python_multi_python_versions")
 
-load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
-
-http_archive(
-    name = "bazel_skylib",
-    sha256 = "c6966ec828da198c5d9adbaa94c05e3a1c7f21bd012a0b29ba8ddbccb2c93b0d",
-    urls = [
-        "https://github.com/bazelbuild/bazel-skylib/releases/download/1.1.1/bazel-skylib-1.1.1.tar.gz",
-        "https://mirror.bazel.build/github.com/bazelbuild/bazel-skylib/releases/download/1.1.1/bazel-skylib-1.1.1.tar.gz",
-    ],
-)
-
 local_repository(
     name = "rules_python",
     path = "../..",
@@ -20,7 +9,9 @@
 
 pip_install_dependencies()
 
-load("@rules_python//python:repositories.bzl", "python_register_multi_toolchains")
+load("@rules_python//python:repositories.bzl", "py_repositories", "python_register_multi_toolchains")
+
+py_repositories()
 
 default_python_version = "3.9"