fix(package): update aggregate-error to version 2.0.0

Author: greenkeeper[bot]

package.json

@@ -17,7 +17,7 @@
  ],
  "dependencies": {
  "@semantic-release/error": "^2.2.0",
- "aggregate-error": "^1.0.0",
+ "aggregate-error": "^2.0.0",
  "execa": "^1.0.0",
  "fs-extra": "^7.0.0",
  "lodash": "^4.17.4",