chore(package): update tslib to version 2.0.0

Closes #40

Author: greenkeeper[bot]

package.json

@@ -128,7 +128,7 @@
     "strip-json-comments-cli": "1.0.1",
     "tiny-glob": "0.2.6",
     "ts-jest": "24.0.2",
-    "tslib": "1.9.3",
+    "tslib": "2.0.0",
     "tslint": "5.16.0",
     "tslint-config-prettier": "1.18.0",
     "tslint-config-standard": "8.0.1",