fix zip under ms win

Author: Francesco Faraone

package.sh

@@ -11,7 +11,7 @@ pyinstaller resources/ccli.spec
 echo "Create tarball for $TRAVIS_OS_NAME -> $TRAVIS_CPU_ARCH..."
 
 if [ "$TRAVIS_OS_NAME" == "windows" ]; then
-    tar.exe -a -c -f product-sync_${TRAVIS_TAG}_${TRAVIS_OS_NAME}_${TRAVIS_CPU_ARCH}.zip dist
+    powershell.exe -nologo -noprofile -command "& { compress-archive -path '.\dist' -destinationpath '.\product-sync_${TRAVIS_TAG}_${TRAVIS_OS_NAME}_${TRAVIS_CPU_ARCH}.zip' }"
     ARCH_EXT="zip"
 else
     tar cvfz product-sync_${TRAVIS_TAG}_${TRAVIS_OS_NAME}_${TRAVIS_CPU_ARCH}.tar.gz dist