build(deps): Bump csv-string from 3.1.7 to 3.1.8

Bumps [csv-string](https://github.com/touv/node-csv-string) from 3.1.7 to 3.1.8.
- [Release notes](https://github.com/touv/node-csv-string/releases)
- [Commits](https://github.com/touv/node-csv-string/commits)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package.json

@@ -25,7 +25,7 @@
   "dependencies": {
     "async": "3.1.1",
     "boom": "7.3.0",
-    "csv-string": "3.1.7",
+    "csv-string": "3.1.8",
     "debug": "4.1.1",
     "pg": "7.18.1",
     "pg-copy-streams": "2.2.2",