Add rules_shell to the pip_parse vendoring example

Author: aignas

examples/pip_parse_vendored/WORKSPACE

@@ -39,3 +39,19 @@ pip_parse(
 load("//:requirements.bzl", "install_deps")
 
 install_deps()
+
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+
+# See https://github.com/bazelbuild/rules_shell/releases/tag/v0.2.0
+http_archive(
+    name = "rules_shell",
+    sha256 = "410e8ff32e018b9efd2743507e7595c26e2628567c42224411ff533b57d27c28",
+    strip_prefix = "rules_shell-0.2.0",
+    url = "https://github.com/bazelbuild/rules_shell/releases/download/v0.2.0/rules_shell-v0.2.0.tar.gz",
+)
+
+load("@rules_shell//shell:repositories.bzl", "rules_shell_dependencies", "rules_shell_toolchains")
+
+rules_shell_dependencies()
+
+rules_shell_toolchains()