Update appveyor.yml

Author: Simsys

appveyor.yml

@@ -10,7 +10,7 @@ clone_folder: c:\dev\qhexedit
 clone_depth: 5
 
 install:
-  - set QTDIR=C:\Qt\5.11.2\mingw53_32
+  - set QTDIR=C:\Qt\5.11.3\mingw53_32
   - set PATH=%QTDIR%\bin;C:\Qt\Tools\mingw530_32\bin;%PATH%;"C:\Program Files (x86)\NSIS";%PATH%
 
 before_build: