fix(deps): update dependency deepmerge to v4.3.0 (#696)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package-lock.json

@@ -22,7 +22,7 @@
   "author": "Brandon Keepers",
   "license": "ISC",
   "dependencies": {
-    "deepmerge": "4.2.2",
+    "deepmerge": "4.3.0",
     "js-yaml": "4.1.0",
     "probot": "12.3.0"
   },