skate: add completion support

Signed-off-by: Rui Chen <[email protected]>

Author: chenrui333

Formula/s/skate.rb

@@ -22,6 +22,8 @@ class Skate < Formula
   def install
     ldflags = "-s -w -X main.Version=#{version}"
     system "go", "build", *std_go_args(ldflags:)
+
+    generate_completions_from_executable(bin/"skate", "completion")
   end
 
   test do