Update Package.swift

Matovsky · web-flow · commit 231c3ad5c814 · 2020-03-30T18:35:39.000+08:00
diff --git a/Package.swift b/Package.swift
@@ -1,3 +1,5 @@
+// swift-tools-version:5.0
+
 import PackageDescription
 
  let package = Package(
