use mv for Windows

Author: zanellia

.travis.yml

@@ -15,8 +15,7 @@ script: cargo build --verbose --release;
 before_deploy:
   - if [ "$TRAVIS_OS_NAME" = "osx" ];   then mv target/release/t_renderer "target/release/t_renderer-$TRAVIS_TAG-$TRAVIS_OS_NAME"; fi
   - if [ "$TRAVIS_OS_NAME" = "linux" ]; then mv target/release/t_renderer "target/release/t_renderer-$TRAVIS_TAG-$TRAVIS_OS_NAME"; fi
-  - if [ "$TRAVIS_OS_NAME" = "windows" ]; then powershell Rename-Item target\release\t_renderer "target\\release\\t_renderer$TRAVIS_TAG-$TRAVIS_OS_NAME"; fi
-
+  - if [ "$TRAVIS_OS_NAME" = "windows" ]; then powershell mv target\release\t_renderer "target\\release\\t_renderer$TRAVIS_TAG-$TRAVIS_OS_NAME"; fi
 
 deploy:
   provider: releases