Update dependency source-map-support to v0.5.20

Author: renovate-bot

package.json

@@ -46,7 +46,7 @@
     "prettier": "1.18.2",
     "reflect-metadata": "0.1.13",
     "sinon": "7.3.2",
-    "source-map-support": "0.5.12",
+    "source-map-support": "0.5.20",
     "ts-node": "8.3.0",
     "tslint": "5.18.0",
     "tslint-config-airbnb-base": "0.3.0",