Update Bazel rules_go to 0.18 (kubernetes-sigs#804)

Signed-off-by: Vince Prignano <[email protected]>

WORKSPACE

@@ -3,8 +3,8 @@ load("@bazel_tools//tools/build_defs/repo:git.bzl", "git_repository")
 
 http_archive(
     name = "io_bazel_rules_go",
-    sha256 = "6776d68ebb897625dead17ae510eac3d5f6342367327875210df44dbe2aeeb19",
-    urls = ["https://github.com/bazelbuild/rules_go/releases/download/0.17.1/rules_go-0.17.1.tar.gz"],
+    sha256 = "301c8b39b0808c49f98895faa6aa8c92cbd605ab5ad4b6a3a652da33a1a2ba2e",
+    urls = ["https://github.com/bazelbuild/rules_go/releases/download/0.18.0/rules_go-0.18.0.tar.gz"],
 )
 
 http_archive(
@@ -13,7 +13,7 @@ http_archive(
     urls = ["https://github.com/bazelbuild/bazel-gazelle/releases/download/0.17.0/bazel-gazelle-0.17.0.tar.gz"],
 )
 
-load("@io_bazel_rules_go//go:deps.bzl", "go_rules_dependencies", "go_register_toolchains")
+load("@io_bazel_rules_go//go:deps.bzl", "go_register_toolchains", "go_rules_dependencies")
 
 go_rules_dependencies()