Update dependency nodemon to v1.19.4

Author: renovate-bot

package.json

@@ -85,7 +85,7 @@
     "ava-ts": "0.23.0",
     "concurrently": "^3.5.0",
     "custom-tslint-formatters": "^2.1.1",
-    "nodemon": "1.12.1",
+    "nodemon": "1.19.4",
     "npm-scripts-info": "^0.3.6",
     "nyc": "11.3.0",
     "opn-cli": "^3.1.0",