Enable the new exception handling instructions in node

Author: vouillon

tools/node_wrapper.sh

@@ -1,3 +1,3 @@
 #!/bin/sh
 export PATH=$(echo $PATH | cut -d : -f 2-) # Do not call oneself recursively
-exec node --experimental-wasm-imported-strings --experimental-wasm-stack-switching --stack-size=10000 "$@"
+exec node --experimental-wasm-exnref --experimental-wasm-imported-strings --experimental-wasm-stack-switching --stack-size=10000 "$@"