Fix building with Visual Studio 2019

This lets CMake use the best generator for that system, which increases the portability of the library and removing the need for workarounds in different environments

binding.gyp

@@ -72,7 +72,6 @@
             }],
 
             ['OS == "win"', {
-              'msbuild_toolset': 'v141',
               'libraries': [
                 '<(PRODUCT_DIR)/../libzmq/lib/libzmq',
                 'ws2_32.lib',

script/build.sh

@@ -12,22 +12,10 @@ if [ -n "${WINDIR}" ]; then
   # Working directory is NAPI temporary build directory.
   PATH_PREFIX="${PWD}/libzmq"
   ARTIFACT="${PATH_PREFIX}/lib/libzmq.lib"
-  CMAKE_GENERATOR="Visual Studio 15 2017"
-  TOOLSET_VERSION="141"
-
-  # In Travis CI, Node paths are:
-  # - C:\ProgramData\nvs\node\<version>\x64\node.exe
-  # - C:\ProgramData\nvs\node\<version>\x86\node.exe
-  if [[ "${NODE}" != *"x86"* ]]; then
-    # Target Windows x64 platform.
-    CMAKE_GENERATOR="${CMAKE_GENERATOR} Win64"
-  fi
 else
   # Working directory is project root.
   PATH_PREFIX="${PWD}/build/libzmq"
   ARTIFACT="${PATH_PREFIX}/lib/libzmq.a"
-  CMAKE_GENERATOR="Unix Makefiles"
-
   export MACOSX_DEPLOYMENT_TARGET=10.9
 fi
 
@@ -57,7 +45,7 @@ else
     echo > "${SRC_DIR}/builds/cmake/Modules/ClangFormat.cmake"
   fi
 
-  cmake -G "${CMAKE_GENERATOR}" \
+  cmake \
     "${BUILD_OPTIONS}" \
     -DCMAKE_INSTALL_PREFIX="${PATH_PREFIX}" \
     -DCMAKE_INSTALL_LIBDIR=lib \
@@ -73,9 +61,10 @@ else
       --config Release \
       --target install \
       -- -verbosity:Minimal -maxcpucount
-    mv \
-      "${PATH_PREFIX}/lib/libzmq-v${TOOLSET_VERSION}-mt-s-${ZMQ_VERSION//./_}.lib" \
-      "${PATH_PREFIX}/lib/libzmq.lib"
+
+    BuilFile=$(find $PATH_PREFIX/lib/*.lib -type f)
+    mv "$BuilFile" "${PATH_PREFIX}/lib/libzmq.lib"
+
   else
     cmake \
       --build .\