Rename package to swift-mustache (#27)

* Rename package to swift-mustache

* Update CI

Sources/Mustache/Parent.swift

@@ -0,0 +1,25 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Hummingbird server framework project
+//
+// Copyright (c) 2021-2021 the Hummingbird authors
+// Licensed under Apache License v2.0
+//
+// See LICENSE.txt for license information
+// See hummingbird/CONTRIBUTORS.txt for the list of Hummingbird authors
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+//===----------------------------------------------------------------------===//
+
+/// Protocol for object that has a custom method for accessing their children, instead
+/// of using Mirror
+public protocol MustacheParent {
+    func child(named: String) -> Any?
+}
+
+/// Extend dictionary where the key is a string so that it uses the key values to access
+/// it values
+extension Dictionary: MustacheParent where Key == String {
+    public func child(named: String) -> Any? { return self[named] }
+}