fix(stardoc): upgrade and stop skipping under bzlmod

Newest stardoc has fixed it, and since bzlmod will select the lowest
version in the dependencies, our bump here will take effect for users
as well.

MODULE.bazel

@@ -6,16 +6,16 @@ module(
     version = "0.0.0",
 )
 
+# Lower-bound versions of our dependencies
 bazel_dep(name = "bazel_skylib", version = "1.4.1")
-bazel_dep(name = "bazel_skylib_gazelle_plugin", version = "1.4.1", dev_dependency = True)
 bazel_dep(name = "platforms", version = "0.0.4")
-bazel_dep(name = "stardoc", repo_name = "io_bazel_stardoc", version = "0.5.0")
+# 0.5.4 is the first version with bzlmod support
+bazel_dep(name = "stardoc", repo_name = "io_bazel_stardoc", version = "0.5.4")
 
 ext = use_extension("@aspect_bazel_lib//lib:extensions.bzl", "ext")
 
 use_repo(ext, "copy_directory_toolchains", "copy_to_directory_toolchains", "jq_toolchains", "yq_toolchains", "coreutils_toolchains", "expand_template_toolchains")
 
-
 register_toolchains(
     "@copy_directory_toolchains//:all",
     "@copy_to_directory_toolchains//:all",
@@ -24,3 +24,7 @@ register_toolchains(
     "@coreutils_toolchains//:all",
     "@expand_template_toolchains//:all"
 )
+
+# Development-only dependencies
+
+bazel_dep(name = "bazel_skylib_gazelle_plugin", version = "1.4.1", dev_dependency = True)

lib/private/docs.bzl

@@ -18,9 +18,6 @@ def stardoc_with_diff_test(
     """
 
     target_compatible_with = kwargs.pop("target_compatible_with", select({
-        # stardoc doesn't work under bzlmod:
-        # https://github.com/bazelbuild/bazel/issues/14140
-        "@aspect_bazel_lib//lib:bzlmod": ["@platforms//:incompatible"],
         # stardoc produces different line endings on Windows
         # which makes the diff_test fail
         "@platforms//os:windows": ["@platforms//:incompatible"],