restore lerna.json and package.json

lerna.json

@@ -0,0 +1,4 @@
+{
+  "packages": ["packages/*"],
+  "version": "1.0.0"
+}

package.json

@@ -0,0 +1,27 @@
+{
+  "name": "mocha-examples",
+  "version": "1.0.0",
+  "description": "A set of examples to help demonstrate common configurations using Mocha. They should all run out-the-box.",
+  "main": "index.js",
+  "scripts": {
+    "postinstall": "lerna bootstrap --no-ci && npm run clean:packagelock",
+    "test": "lerna run --stream test",
+    "clean": "lerna clean",
+    "postclean": "npm run clean:packagelock",
+    "clean:packagelock": "rimraf -g **/package-lock.json"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/mochajs/mocha-examples.git"
+  },
+  "author": "",
+  "license": "ISC",
+  "bugs": {
+    "url": "https://github.com/mochajs/mocha-examples/issues"
+  },
+  "homepage": "https://github.com/mochajs/mocha-examples#readme",
+  "devDependencies": {
+    "lerna": "^5.0.0",
+    "rimraf": "^3.0.2"
+  }
+}