add flatbuffers

commit 6da1cf79d90eb242e7da5318241d42279a3df3ba
Author: Max Burke <max@urbanlogiq.com>
Date:   Sun Jan 19 14:47:28 2020 -0800

    [rust] Add use declarations to Rust-generated bindings for imported FB definitions (#5645)

    * Bugfix for Rust generation of union fields named with language keywords

flatbuffers/swift/Package.swift

@@ -0,0 +1,22 @@
+// swift-tools-version:5.1
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+import PackageDescription
+
+let package = Package(
+    name: "FlatBuffers",
+    platforms: [
+        .iOS(.v11),
+        .macOS(.v10_14),
+    ],
+    products: [
+        .library(
+            name: "FlatBuffers",
+            targets: ["FlatBuffers"]),
+    ],
+    targets: [
+        .target(
+            name: "FlatBuffers",
+            dependencies: []),
+    ]
+)