chore(package): update rollup-plugin-typescript2 to version 0.27.1

Closes #5

Author: greenkeeper[bot]

package.json

@@ -97,7 +97,7 @@
     "rollup-plugin-json": "^3.0.0",
     "rollup-plugin-node-resolve": "^3.0.0",
     "rollup-plugin-sourcemaps": "^0.4.2",
-    "rollup-plugin-typescript2": "^0.15.1",
+    "rollup-plugin-typescript2": "^0.27.1",
     "semantic-release": "^15.6.0",
     "travis-deploy-once": "^5.0.0",
     "ts-jest": "^24.0.0",