Bump tslib from 1.9.3 to 2.0.1

Bumps [tslib](https://github.com/Microsoft/tslib) from 1.9.3 to 2.0.1.
- [Release notes](https://github.com/Microsoft/tslib/releases)
- [Commits](microsoft/tslib@1.9.3...2.0.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

package.json

@@ -47,7 +47,7 @@
     "supertest": "^3.1.0",
     "ts-node": "^8.10.2",
     "tsc": "^1.20150623.0",
-    "tslib": "^1.9.3",
+    "tslib": "^2.0.1",
     "tslint": "^5.11.0",
     "tslint-config-airbnb": "^5.11.2",
     "tslint-config-prettier": "^1.14.0",

yarn.lock

@@ -3069,10 +3069,14 @@ tslib@1.9.0:
   version "1.9.0"
   resolved "https://registry.yarnpkg.com/tslib/-/tslib-1.9.0.tgz#e37a86fda8cbbaf23a057f473c9f4dc64e5fc2e8"
 
-tslib@^1.7.1, tslib@^1.8.0, tslib@^1.8.1, tslib@^1.9.3:
+tslib@^1.7.1, tslib@^1.8.0, tslib@^1.8.1:
   version "1.9.3"
   resolved "https://registry.yarnpkg.com/tslib/-/tslib-1.9.3.tgz#d7e4dd79245d85428c4d7e4822a79917954ca286"
 
+tslib@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/tslib/-/tslib-2.0.1.tgz#410eb0d113e5b6356490eec749603725b021b43e"
+
 tslint-config-airbnb@^5.11.2:
   version "5.11.2"
   resolved "https://registry.yarnpkg.com/tslint-config-airbnb/-/tslint-config-airbnb-5.11.2.tgz#2f3d239fa3923be8e7a4372217a7ed552671528f"