Currently, taocpp/json requires a 64 bit system

Author: d-frey

.appveyor.yml

@@ -13,26 +13,26 @@ configuration:
 
 environment:
   matrix:
-    - GENERATOR: Visual Studio 14 2015
+#    - GENERATOR: Visual Studio 14 2015
 
     - GENERATOR: Visual Studio 14 2015 Win64
 
-    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
-      GENERATOR: Visual Studio 15 2017
+#    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
+#      GENERATOR: Visual Studio 15 2017
 
     - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
       GENERATOR: Visual Studio 15 2017 Win64
 
-    - GENERATOR: MinGW Makefiles
-      BINDIR: C:\MinGW\bin
+#    - GENERATOR: MinGW Makefiles
+#      BINDIR: C:\MinGW\bin
 
-    - GENERATOR: MinGW Makefiles
-      COMPILER: MinGW 5
-      BINDIR: C:\mingw-w64\i686-5.3.0-posix-dwarf-rt_v4-rev0\mingw32\bin
+#    - GENERATOR: MinGW Makefiles
+#      COMPILER: MinGW 5
+#      BINDIR: C:\mingw-w64\i686-5.3.0-posix-dwarf-rt_v4-rev0\mingw32\bin
 
-    - GENERATOR: MinGW Makefiles
-      COMPILER: MinGW 6
-      BINDIR: C:\mingw-w64\i686-6.3.0-posix-dwarf-rt_v5-rev1\mingw32\bin
+#    - GENERATOR: MinGW Makefiles
+#      COMPILER: MinGW 6
+#      BINDIR: C:\mingw-w64\i686-6.3.0-posix-dwarf-rt_v5-rev1\mingw32\bin
 
     - GENERATOR: MinGW Makefiles
       COMPILER: MinGW 6