message: build: appveyor is using visual studio 2015, change to 2017
diff: # http://www.appveyor.com/docs/appveyor-yml
  # mostly copied from nan appveyor.yml
  -os: Visual Studio 2015
  +os: Visual Studio 2017
  environment:
  DEBUG: "node-libcurl"
  @@ -23,7 +23,7 @@ clone_depth: 5
  # Install scripts. (runs after repo cloning)
  install:
  # Get nasm
  - - cinst nasm
  + - cinst nasm -y
  - set PATH=%PROGRAMFILES%\NASM;%PATH%
  # in case above does not work
  # - curl -L -o nasminst.exe http://libgd.blob.core.windows.net/nasm/nasm-2.07-installer.exe
  @@ -53,7 +53,7 @@ build_script:
  #- npm install --build-from-source --msvs_version=2015 --loglevel=http
  # Let's use yarn
  - set npm_config_build_from_source=true
  - - set npm_config_msvs_version=2015
  + - set npm_config_msvs_version=2017
  - yarn install --frozen-lockfile
  # Post-install test scripts.
  test_script:
  