chore(deps): update dependency rollup-plugin-sourcemaps to v0.6.1

Author: renovate-bot

package-lock.json

@@ -35,7 +35,7 @@
     "rollup-plugin-babel": "4.0.0-beta.8",
     "rollup-plugin-commonjs": "9.1.5",
     "rollup-plugin-node-resolve": "3.3.0",
-    "rollup-plugin-sourcemaps": "0.4.2",
+    "rollup-plugin-sourcemaps": "0.6.1",
     "tslint": "5.11.0",
     "tslint-config-prettier": "1.14.0",
     "tslint-eslint-rules": "5.4.0",