chore: update lerna to v3.1

Author: marionebl

@commitlint/config-lerna-scopes/package.json

@@ -39,14 +39,17 @@
     "url": "https://github.com/marionebl/commitlint/issues"
   },
   "homepage": "https://github.com/marionebl/commitlint#readme",
+  "peerDependencies": {
+    "lerna": "^3.0.0"
+  },
   "dependencies": {
-    "import-from": "2.1.0",
-    "lerna": "3.0.4"
+    "import-from": "2.1.0"
   },
   "devDependencies": {
     "@commitlint/test": "^7.0.0",
     "@commitlint/utils": "^7.0.0",
     "ava": "0.22.0",
+    "lerna": "3.1.1",
     "xo": "0.20.3"
   }
 }

lerna.json

@@ -1,5 +1,5 @@
 {
-  "lerna": "3.0.4",
+  "lerna": "3.1.1",
   "npmClient": "yarn",
   "useWorkspaces": true,
   "version": "7.0.1"

package.json

@@ -96,7 +96,7 @@
     "eslint": "4.18.1",
     "eslint-config-prettier": "2.9.0",
     "husky": "0.14.3",
-    "lerna": "3.0.4",
+    "lerna": "3.1.1",
     "lint-staged": "6.1.1",
     "npx": "9.7.1",
     "prettier": "1.10.2",