chore(package): update puppeteer to version 3.1.0

Closes #120

Author: greenkeeper[bot]

package.json

@@ -70,7 +70,7 @@
     "ilp-plugin-mini-accounts": "^4.2.0",
     "mocha": "^7.1.2",
     "nyc": "^15.0.0",
-    "puppeteer": "^1.19.0",
+    "puppeteer": "^3.1.0",
     "sinon": "^6.0.1",
     "source-map-support": "^0.5.6",
     "ts-loader": "^6.1.0",