trying VS 2019 on appveyor again
diff --git a/appveyor.yml b/appveyor.yml
index 83538dd..f909e3d 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -28,8 +28,8 @@
     APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
   - gen: "Visual Studio 15 2017"
     APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
-#  - gen: "Visual Studio 16 2019"
-#    APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019 Preview
+  - gen: "Visual Studio 16 2019"
+    APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
 
 install:
   - IF "%gen%" == "MinGW Makefiles" appveyor-retry appveyor DownloadFile http://downloads.sourceforge.net/mingw-w64/x86_64-8.1.0-release-posix-seh-rt_v6-rev0.7z