Update to Spectre 0.9.0 (#247)

* update to Spectre 0.9.0

* fix variable spec tests

* fix flatMap warning

* updated CHANGELOG

Tests/StencilTests/StencilSpec.swift

@@ -1,7 +1,7 @@
+import XCTest
 import Spectre
 import Stencil
 
-
 fileprivate struct CustomNode : NodeType {
   let token: Token?
   func render(_ context:Context) throws -> String {
@@ -9,64 +9,64 @@ fileprivate struct CustomNode : NodeType {
   }
 }
 
-
 fileprivate struct Article {
   let title: String
   let author: String
 }
 
+class StencilTests: XCTestCase {
+  func testStencil() {
+    describe("Stencil") {
+      let exampleExtension = Extension()
 
-func testStencil() {
-  describe("Stencil") {
-    let exampleExtension = Extension()
+      exampleExtension.registerSimpleTag("simpletag") { context in
+        return "Hello World"
+      }
 
-    exampleExtension.registerSimpleTag("simpletag") { context in
-      return "Hello World"
-    }
+      exampleExtension.registerTag("customtag") { parser, token in
+        return CustomNode(token: token)
+      }
 
-    exampleExtension.registerTag("customtag") { parser, token in
-      return CustomNode(token: token)
-    }
+      let environment = Environment(extensions: [exampleExtension])
 
-    let environment = Environment(extensions: [exampleExtension])
+      $0.it("can render the README example") {
 
-    $0.it("can render the README example") {
+        let templateString = """
+          There are {{ articles.count }} articles.
 
-      let templateString = """
-        There are {{ articles.count }} articles.
+          {% for article in articles %}\
+              - {{ article.title }} by {{ article.author }}.
+          {% endfor %}
+          """
 
-        {% for article in articles %}\
-            - {{ article.title }} by {{ article.author }}.
-        {% endfor %}
-        """
-
-      let context = [
-        "articles": [
-          Article(title: "Migrating from OCUnit to XCTest", author: "Kyle Fuller"),
-          Article(title: "Memory Management with ARC", author: "Kyle Fuller"),
+        let context = [
+          "articles": [
+            Article(title: "Migrating from OCUnit to XCTest", author: "Kyle Fuller"),
+            Article(title: "Memory Management with ARC", author: "Kyle Fuller"),
+          ]
         ]
-      ]
 
-      let template = Template(templateString: templateString)
-      let result = try template.render(context)
+        let template = Template(templateString: templateString)
+        let result = try template.render(context)
 
-      try expect(result) == """
-        There are 2 articles.
+        try expect(result) == """
+          There are 2 articles.
 
-            - Migrating from OCUnit to XCTest by Kyle Fuller.
-            - Memory Management with ARC by Kyle Fuller.
+              - Migrating from OCUnit to XCTest by Kyle Fuller.
+              - Memory Management with ARC by Kyle Fuller.
 
-        """
-    }
+          """
+      }
 
-    $0.it("can render a custom template tag") {
-      let result = try environment.renderTemplate(string: "{% customtag %}")
-      try expect(result) == "Hello World"
-    }
+      $0.it("can render a custom template tag") {
+        let result = try environment.renderTemplate(string: "{% customtag %}")
+        try expect(result) == "Hello World"
+      }
 
-    $0.it("can render a simple custom tag") {
-      let result = try environment.renderTemplate(string: "{% simpletag %}")
-      try expect(result) == "Hello World"
+      $0.it("can render a simple custom tag") {
+        let result = try environment.renderTemplate(string: "{% simpletag %}")
+        try expect(result) == "Hello World"
+      }
     }
   }
 }