fix: add chmod +x to dist/index.js (#16)

scripts/build.sh

@@ -3,5 +3,10 @@
 # build dist/index.js file
 npm run clean && ncc build ./index.ts -o ./dist/ --minify --no-cache --no-source-map-register
 
-# add shebang to the top of dist/index.js (space after shebang is to fix windows issue)
-echo '#!/usr/bin/env node ' | cat - dist/index.js > temp && mv temp dist/index.js
+# add shebang to the top of dist/index.js
+# XXX: Windows needs a space after `node` to work correctly
+# Note: ncc can handle shebang but it didn't work with Windows in our tests
+echo '#!/usr/bin/env node ' | cat - dist/index.js >temp && mv temp dist/index.js
+
+# make dist/index.js executable
+chmod +x dist/index.js