chore(deps): update dependency lerna to v8

Author: renovate[bot]

package.json

@@ -36,7 +36,7 @@
     "html-webpack-plugin": "^3.2.0",
     "husky": "^3.1.0",
     "jest": "^24.9.0",
-    "lerna": "^3.22.1",
+    "lerna": "^8.1.2",
     "lerna-changelog": "^0.8.3",
     "less": "^3.13.1",
     "less-loader": "^5.0.0",