chore: updated to lerna@6.1.0

Signed-off-by: Akos Kitta <a.kitta@arduino.cc>

Author: Akos Kitta

package.json

@@ -25,7 +25,7 @@
     "husky": "^6.0.0",
     "ignore-styles": "^5.0.1",
     "jsdom": "^11.5.1",
-    "lerna": "^3.20.2",
+    "lerna": "^6.1.0",
     "lint-staged": "^11.0.0",
     "node-gyp": "^9.3.0",
     "prettier": "^2.3.1",