chore(package): update rollup-plugin-terser to version 5.0.0

Author: greenkeeper[bot]

package.json

@@ -41,7 +41,7 @@
     "jsdom": "^15.1.0",
     "rollup": "^1.12.3",
     "rollup-plugin-node-resolve": "^5.0.0",
-    "rollup-plugin-terser": "^4.0.4",
+    "rollup-plugin-terser": "^5.0.0",
     "tape": "^4.9.0",
     "tape-await": "0.1.2"
   }