Update module bazelbuild/rules_go to v0.21.0

[renovate-bot]

This PR contains the following updates:

Package	Type	Update	Change
github.com/bazelbuild/rules_go	require	minor	v0.20.4 -> v0.21.0

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Release Notes

bazelbuild/rules_go

v0.21.0

Compare Source

Compatibility

• The minimum supported version of Bazel is now 1.2.0 (was 0.23.0). Some of our dependencies are no longer compatible with old versions of Bazel, so we needed to drop some support.
• The go_rule wrapper function is now deprecated, since it doesn't work well after some Bazel compatibility changes in 2.0.0. See the deprecation schedule for rationale and migration information. In general, we're evaluating a change to the way we handle toolchains and flags in order to better support configurations. If you have custom rules declared with go_rule or go_context or if you use custom toolchains compatible with go_toolchain, please reach out via go-bazel-discuss or on the #bazel channel on Gophers Slack.

Changes

This release contains no significant user facing changes. Several bugs are fixed, and dependencies are updated. Compatibility with Bazel 2.0.0 and later versions is improved.

Updated dependencies

• platforms (https://github.com/bazelbuild/platforms) has been added at master as of 2020-01-02 (see bazelbuild/bazel#​8622).
• rules_cc (https://github.com/bazelbuild/rules_cc) has been added at master as of 2020-01-06 (see bazelbuild/bazel#​8743).
• org_golang_x_tools is updated to master as of 2020-01-02.
• com_github_golang_protobuf is updated to v1.3.2, latest as of 2020-01-03.
• com_github_mwitkow_go_proto_validators is updated to v0.3.0, latest as of 2020-01-03.
• com_github_gogo_protobuf is updated to v1.3.1, latest as of 2020-01-03.
• org_golang_google_genproto is updated to master as of 2020-01-03.
• go_googleapis is updated to master as of 2020-01-03.
• If you use proto_library, you may need to migrate to rules_proto (https://github.com/bazelbuild/rules_proto) (see bazelbuild/bazel#​8922).

WORKSPACE code

load("@​bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")

http_archive(
    name = "io_bazel_rules_go",
    urls = [
        "https://storage.googleapis.com/bazel-mirror/github.com/bazelbuild/rules_go/releases/download/v0.21.0/rules_go-v0.21.0.tar.gz",
        "https://github.com/bazelbuild/rules_go/releases/download/v0.21.0/rules_go-v0.21.0.tar.gz",
    ],
    sha256 = "b27e55d2dcc9e6020e17614ae6e0374818a3e3ce6f2024036e688ada24110444",
)

load("@​io_bazel_rules_go//go:deps.bzl", "go_rules_dependencies", "go_register_toolchains")

go_rules_dependencies()

go_register_toolchains()

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