Rename package to swift-mustache (#27)

* Rename package to swift-mustache

* Update CI

Sources/Mustache/Sequence.swift

@@ -0,0 +1,57 @@
+//===----------------------------------------------------------------------===//
+//
+// 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 objects that can be rendered as a sequence in Mustache
+protocol MustacheSequence {
+    /// Render section using template
+    func renderSection(with template: MustacheTemplate, context: MustacheContext) -> String
+    /// Render inverted section using template
+    func renderInvertedSection(with template: MustacheTemplate, context: MustacheContext) -> String
+}
+
+extension Sequence {
+    /// Render section using template
+    func renderSection(with template: MustacheTemplate, context: MustacheContext) -> String {
+        var string = ""
+        var sequenceContext = MustacheSequenceContext(first: true)
+
+        var iterator = makeIterator()
+        guard var currentObject = iterator.next() else { return "" }
+
+        while let object = iterator.next() {
+            string += template.render(context: context.withSequence(currentObject, sequenceContext: sequenceContext))
+            currentObject = object
+            sequenceContext.first = false
+            sequenceContext.index += 1
+        }
+
+        sequenceContext.last = true
+        string += template.render(context: context.withSequence(currentObject, sequenceContext: sequenceContext))
+
+        return string
+    }
+
+    /// Render inverted section using template
+    func renderInvertedSection(with template: MustacheTemplate, context: MustacheContext) -> String {
+        var iterator = makeIterator()
+        if iterator.next() == nil {
+            return template.render(context: context.withObject(self))
+        }
+        return ""
+    }
+}
+
+extension Array: MustacheSequence {}
+extension Set: MustacheSequence {}
+extension ReversedCollection: MustacheSequence {}