Rename package to swift-mustache (#27)

* Rename package to swift-mustache

* Update CI

Sources/Mustache/Mirror.swift

@@ -0,0 +1,31 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+extension Mirror {
+    /// Return value from Mirror given name
+    func getValue(forKey key: String) -> Any? {
+        guard let matched = children.filter({ $0.label == key }).first else {
+            return nil
+        }
+        return unwrapOptional(matched.value)
+    }
+}
+
+/// Return object and if it is an Optional return object Optional holds
+private func unwrapOptional(_ object: Any) -> Any? {
+    let mirror = Mirror(reflecting: object)
+    guard mirror.displayStyle == .optional else { return object }
+    guard let first = mirror.children.first else { return nil }
+    return first.value
+}