chore(package): update rollup-plugin-typescript2 to version 0.24.2

Closes #29

Author: greenkeeper[bot]

package.json

@@ -119,7 +119,7 @@
     "rollup-plugin-json": "^4.0.0",
     "rollup-plugin-node-resolve": "^4.0.0",
     "rollup-plugin-sourcemaps": "^0.4.2",
-    "rollup-plugin-typescript2": "^0.21.0",
+    "rollup-plugin-typescript2": "^0.24.2",
     "semantic-release": "^15.9.16",
     "travis-deploy-once": "^5.0.9",
     "ts-jest": "^24.0.0",