Add is_bazel_module to deps.bzl. (#1771)

diff --git a/BUILD.bazel b/BUILD.bazel
index a57a1c3..5467e22 100644
--- a/BUILD.bazel
+++ b/BUILD.bazel
@@ -112,6 +112,7 @@
         "//internal:go_repository_cache",
         "//internal:go_repository_config",
         "//internal:go_repository_tools",
+        "//internal:is_bazel_module",
         "@bazel_tools//tools/build_defs/repo:git.bzl",
     ],
 )