Call the batch file properly

Author: kristjanvalur

.travis.yml

@@ -20,10 +20,9 @@ jobs:
       name: x64_msvc
       script:
         - cd vs2019
-        - build_x64.cmd && x64/Debug/test.exe
+        - ./build_x64.cmd && x64/Debug/test.exe
     - os: windows
       name: x86_msvc
       script:
         - cd vs2019
-        - 'cmd "/C build_x86.cmd"'
-        - Win32/Debug/test.exe
+        - ./build_x86.cmd && Win32/Debug/test.exe

vs2019/build_x64.cmd

@@ -1,3 +1,3 @@
 rem Build x64 with visualstudio2017buildtools
-"C:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\Common7\Tools\VsDevCmd.bat"
+call "C:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\Common7\Tools\VsDevCmd.bat"
 msbuild stackman.sln /p:Platform=x64

vs2019/build_x86.cmd

@@ -1,3 +1,3 @@
 rem Build x86 with visualstudio2017buildtools
-"C:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\Common7\Tools\VsDevCmd.bat"
+call "C:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\Common7\Tools\VsDevCmd.bat"
 msbuild stackman.sln /p:Platform=x86