Bump buildtools to 5.1.0+ (#277)

* bazel run @go_sdk//:bin/go -- get github.com/bazelbuild/buildtools
* bazel run @go_sdk//:bin/go -- mod vendor

Author: pcj

go.mod

@@ -4,7 +4,7 @@ go 1.15
 
 require (
 	github.com/bazelbuild/bazel-gazelle v0.24.0
-	github.com/bazelbuild/buildtools v0.0.0-20210408102303-2b0a1af1a898
+	github.com/bazelbuild/buildtools v0.0.0-20221004120235-7186f635531b
 	github.com/bazelbuild/rules_go v0.27.0
 	github.com/bmatcuk/doublestar v1.2.2
 	github.com/emicklei/proto v1.9.0

go.sum

@@ -2,8 +2,8 @@ cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMT
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/bazelbuild/buildtools v0.0.0-20200718160251-b1667ff58f71/go.mod h1:5JP0TXzWDHXv8qvxRC4InIazwdyDseBDbzESUMKk1yU=
-github.com/bazelbuild/buildtools v0.0.0-20210408102303-2b0a1af1a898 h1:V8cZmvXo+hTRtwbaMUOAJoU4ZYBF/tS2wzwx+ywWV1E=
-github.com/bazelbuild/buildtools v0.0.0-20210408102303-2b0a1af1a898/go.mod h1:689QdV3hBP7Vo9dJMmzhoYIyo/9iMhEmHkJcnaPRCbo=
+github.com/bazelbuild/buildtools v0.0.0-20221004120235-7186f635531b h1:jhiMzJ+8unnLRtV8rpbWBFE9pFNzIqgUTyZU5aA++w8=
+github.com/bazelbuild/buildtools v0.0.0-20221004120235-7186f635531b/go.mod h1:689QdV3hBP7Vo9dJMmzhoYIyo/9iMhEmHkJcnaPRCbo=
 github.com/bazelbuild/rules_go v0.0.0-20190719190356-6dae44dc5cab/go.mod h1:MC23Dc/wkXEyk3Wpq6lCqz0ZAYOZDw2DR5y3N1q2i7M=
 github.com/bazelbuild/rules_go v0.27.0 h1:KViqR7qKXwz+LrNdIauCDU21kneCk+4DnYjpvlJwH50=
 github.com/bazelbuild/rules_go v0.27.0/go.mod h1:MC23Dc/wkXEyk3Wpq6lCqz0ZAYOZDw2DR5y3N1q2i7M=