build(deps): update csv-string requirement from 3.1.3 to 3.1.4

Updates the requirements on [csv-string](https://github.com/touv/node-csv-string) to permit the latest version.
- [Release notes](https://github.com/touv/node-csv-string/releases)
- [Commits](https://github.com/touv/node-csv-string/commits/v3.1.4)

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

package.json

@@ -25,7 +25,7 @@
   "dependencies": {
     "async": "2.6.1",
     "boom": "7.2.0",
-    "csv-string": "3.1.3",
+    "csv-string": "3.1.4",
     "debug": "3.1.0",
     "pg": "7.4.3",
     "pg-copy-streams": "1.2.0",