Addnew sheets (armor, weapons, malefica) and v13 support

node_modules/vinyl/lib/is-stream.js

@@ -0,0 +1,15 @@
+'use strict';
+
+function isStream(stream) {
+  if (!stream) {
+    return false;
+  }
+
+  if (typeof stream.pipe !== 'function') {
+    return false;
+  }
+
+  return true;
+}
+
+module.exports = isStream;