fix(package): update tslib to version 1.12.0

Closes #95

Author: greenkeeper[bot]

package.json

@@ -51,6 +51,6 @@
     "inversify": "^5.0.1",
     "inversify-express-utils": "^6.3.2",
     "openapi3-ts": "^1.3.0",
-    "tslib": "1.10.0"
+    "tslib": "1.12.0"
   }
 }