Bump underscore from 1.13.6 to 1.13.8 in /lib/ts

Bumps [underscore](https://github.com/jashkenas/underscore) from 1.13.6 to 1.13.8.
- [Commits](https://github.com/jashkenas/underscore/compare/1.13.6...1.13.8)

---
updated-dependencies:
- dependency-name: underscore
  dependency-version: 1.13.8
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/lib/ts/package-lock.json b/lib/ts/package-lock.json
index 1994c6d..01677b2 100644
--- a/lib/ts/package-lock.json
+++ b/lib/ts/package-lock.json
@@ -5246,9 +5246,10 @@
       }
     },
     "node_modules/underscore": {
-      "version": "1.13.6",
-      "resolved": "https://registry.npmjs.org/underscore/-/underscore-1.13.6.tgz",
-      "integrity": "sha512-+A5Sja4HP1M08MaXya7p5LvjuM7K6q/2EaC0+iovj/wOcMsTzMvDFbasi/oSapiwOlt252IqsKqPjCl7huKS0A=="
+      "version": "1.13.8",
+      "resolved": "https://registry.npmjs.org/underscore/-/underscore-1.13.8.tgz",
+      "integrity": "sha512-DXtD3ZtEQzc7M8m4cXotyHR+FAS18C64asBYY5vqZexfYryNNnDc02W4hKg3rdQuqOYas1jkseX0+nZXjTXnvQ==",
+      "license": "MIT"
     },
     "node_modules/underscore.string": {
       "version": "3.3.6",