chore(deps): update dependency source-map-support to v0.5.21

Author: renovate[bot]

package-lock.json

@@ -34,13 +34,13 @@
     "@types/lodash": "4.14.141",
     "@types/mocha": "5.2.7",
     "@types/node": "8.10.54",
-    "@types/source-map-support": "0.5.0",
+    "@types/source-map-support": "0.5.6",
     "assert-rejects": "0.1.1",
     "jscpd": "0.6.25",
     "mocha": "5.2.0",
     "nyc": "11.9.0",
     "rimraf": "2.7.1",
-    "source-map-support": "0.5.13"
+    "source-map-support": "0.5.21"
   },
   "publishConfig": {
     "access": "public"