chore(package): update rollup-plugin-sourcemaps to version 0.6.2

Closes #21

Author: greenkeeper[bot]

package.json

@@ -76,7 +76,7 @@
     "rollup-plugin-commonjs": "^10.1.0",
     "rollup-plugin-json": "^4.0.0",
     "rollup-plugin-node-resolve": "^5.2.0",
-    "rollup-plugin-sourcemaps": "^0.4.2",
+    "rollup-plugin-sourcemaps": "^0.6.2",
     "rollup-plugin-typescript2": "^0.24.3",
     "shelljs": "^0.8.3",
     "ts-jest": "^24.1.0",