Make the binary executeable to get compressed

Author: enko

.travis.yml

@@ -26,6 +26,7 @@ script:
 - mkdir -p dist/schema
 - npm run generate-config-schema
 - npm run build
+- chmod u+x ~/.nexe/*
 - strip -s ~/.nexe/*
 - upx -9 ~/.nexe/*
 - npm run build