chore(deps): update jest-junit to v8 (#456)

Author: renovate[bot]

package-lock.json

@@ -57,7 +57,7 @@
     "file-loader": "^4.2.0",
     "husky": "^3.0.1",
     "jest": "^24.9.0",
-    "jest-junit": "^7.0.0",
+    "jest-junit": "^8.0.0",
     "lint-staged": "^9.2.0",
     "prettier": "^1.18.2",
     "standard-version": "^7.0.0",