Update appveyor.yml

Author: mpastell

appveyor.yml

@@ -7,7 +7,7 @@ environment:
 
 matrix:
   allow_failures:
-    - JULIA_URL: "https://julialang-s3.julialang.org/bin/winnt/x86/0.6/julia-0.7-latest-win32.exe"
+    - JULIA_URL: "https://julialang-s3.julialang.org/bin/winnt/x86/0.7/julia-0.7-latest-win32.exe"
     - JULIA_URL: "https://julialangnightlies-s3.julialang.org/bin/winnt/x86/julia-latest-win32.exe"
     - JULIA_URL: "https://julialangnightlies-s3.julialang.org/bin/winnt/x64/julia-latest-win64.exe"