add windows binary-zip

Using 7-Zip

scripts/binary/zip.coffee

@@ -68,9 +68,31 @@ linuxZip = (src, dest) ->
   .then R.tap(checkZipSize)
   .catch onError
 
+# resolves with zipped filename
+windowsZip = (src, dest) ->
+  # use 7Zip to zip
+  # http://www.7-zip.org/
+  cmd = "7z a #{dest} #{src}#{path.sep}*"
+  console.log("windows zip: #{cmd}")
+
+  onZipFinished = () ->
+    console.log("✅ zip finished")
+
+  onError = (err) ->
+    console.error("⛔️ could not zip #{src} into #{dest}")
+    console.error(err.message)
+    throw err
+
+  execa.shell(cmd)
+  .then onZipFinished
+  .then R.always(dest)
+  .then R.tap(checkZipSize)
+  .catch onError
+
 zippers = {
   linux: linuxZip
   darwin: macZip
+  win32: windowsZip
 }
 
 module.exports = {