fix: post process generated flow definition

web3.js/scripts/flowgen.sh

@@ -0,0 +1,16 @@
+set -ex
+
+# Generate flowdef
+npx flowgen lib/types/index.d.ts -o module.flow.js
+
+# Remove trailing export
+sed -i '/declare export {/{:a;N;/}/!ba};//g' module.flow.js
+
+# Change all declarations to exports
+sed -i 's/declare/declare export/g' module.flow.js
+
+# Prepend declare module line
+sed -i '7s;^;declare module "@solana/web3.js" {\n;' module.flow.js
+
+# Append closing brace for module declaration
+echo '}' >> module.flow.js