Update dependency io_bazel_rules_go to v0.12.1

Author: renovate-bot

WORKSPACE

@@ -55,8 +55,8 @@ http_archive(
 # Some of the TypeScript tooling is written in Go.
 http_archive(
     name = "io_bazel_rules_go",
-    url = "https://github.com/bazelbuild/rules_go/releases/download/0.11.0/rules_go-0.11.0.tar.gz",
-    sha256 = "f70c35a8c779bb92f7521ecb5a1c6604e9c3edd431e50b6376d7497abc8ad3c1",
+    url = "https://github.com/bazelbuild/rules_go/releases/download/0.12.1/rules_go-0.12.1.tar.gz",
+    sha256 = "8b68d0630d63d95dacc0016c3bb4b76154fe34fca93efd65d1c366de3fcb4294",
 )
 
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