change windows format to zip over tar

Author: Anthony Barbieri

.goreleaser.yml

@@ -18,6 +18,10 @@ archives:
     windows: Windows
     386: i386
     amd64: x86_64
+  format: tar.gz
+  format_overrides:
+  - goos: windows
+    format: zip
 dockers:
   -
     binaries: