fix allow-failure setting

Author: aviks

appveyor.yml

@@ -15,8 +15,8 @@ environment:
 
 matrix:
   allow_failures:
-    - JULIA_URL: "https://julialang-s3.julialang.org/bin/winnt/x86/0.4/julia-0.5-latest-win32.exe"
-    - JULIA_URL: "https://julialang-s3.julialang.org/bin/winnt/x86/0.5/julia-0.6-latest-win32.exe"
+    - JULIA_URL: "https://julialang-s3.julialang.org/bin/winnt/x86/0.5/julia-0.5-latest-win32.exe"
+    - JULIA_URL: "https://julialang-s3.julialang.org/bin/winnt/x86/0.6/julia-0.6-latest-win32.exe"
     - JULIA_URL: "https://julialangnightlies-s3.julialang.org/bin/winnt/x86/julia-latest-win32.exe"
 
 branches: