Remove extra `path` element (#341)

The blue capsule in the PathDemo, rendered to HTML:

```diff
 <svg style="width: 100%;height: 100%; overflow: visible;">
   <rect
     x="0.0"
     height="100%"
     width="100%"
     y="0.0"
     ry="50%"
     stroke-width="0.0"
   ></rect>
-  <path style="stroke-width: 0.0;" d=""></path>
 </svg>
```

* Run swiftformat

* Remove excess `path` element

Sources/TokamakDOM/Core.swift

@@ -132,6 +132,7 @@ public typealias AnyView = TokamakCore.AnyView
 public typealias EmptyView = TokamakCore.EmptyView
 
 // MARK: Text
+
 public typealias TextAlignment = TokamakCore.TextAlignment
 
 // MARK: App & Scene

Sources/TokamakStaticHTML/Shapes/Path.swift

@@ -95,6 +95,7 @@ extension Path: ViewDeferredToRenderer {
     elements: [Element],
     strokeStyle: StrokeStyle = .zero
   ) -> AnyView {
+    if elements.isEmpty { return AnyView(EmptyView()) }
     var d = [String]()
     for element in elements {
       switch element {