Fixed the public scope of the buildEither(component:) components of RouterBuilder (#12)

Author: devyhan

.swiftpm/xcode/package.xcworkspace/xcuserdata/ijaewon.xcuserdatad/UserInterfaceState.xcuserstate

@@ -18,11 +18,11 @@ public struct RouterBuilder {
     CombinedRouter(components)
   }
 
-  static func buildEither(first component: _RouterProtocol) -> _RouterProtocol {
+  public static func buildEither(first component: _RouterProtocol) -> _RouterProtocol {
     CombinedRouter([component])
   }
 
-  static func buildEither(second component: _RouterProtocol) -> _RouterProtocol {
+  public static func buildEither(second component: _RouterProtocol) -> _RouterProtocol {
     CombinedRouter([component])
   }
 }