Add pre-publish script

scripts/pre-publish.sh

@@ -0,0 +1,13 @@
+#! /usr/bin/env bash
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+echo "Preparing package.json for distributions"
+bash scripts/prepare-package-json.sh
+
+echo "Copying .npmrc to dist/"
+cp .npmrc dist/
+
+echo "Pre-publish done"