removed lerna

package.json

@@ -3,16 +3,15 @@
   "private": true,
   "description": "The repository for all <model-viewer> packages",
   "scripts": {
-    "test": "./node_modules/.bin/lerna run test --stream",
-    "test:ci": "./node_modules/.bin/lerna run test:ci --stream",
-    "bootstrap": "./node_modules/.bin/lerna bootstrap --ci",
+    "test": "npm test --workspaces",
+    "test:ci": "npm test:ci --workspaces",
     "format": "find packages/**/src -name '*.ts' | grep -v .d.ts | xargs ./node_modules/.bin/clang-format --verbose -i",
     "lint": "./node_modules/.bin/eslint \"packages/**/*.ts\"",
     "lint:fix": "npm run lint -- --fix",
-    "clean": "./node_modules/.bin/lerna run clean --stream",
-    "build": "./node_modules/.bin/lerna run build --stream",
+    "clean": "npm run clean --workspaces",
+    "build": "npm run build --workspaces",
     "serve": "./node_modules/.bin/http-server -c-1",
-    "update:package-lock": "rm -rf node_modules package-lock.json && npm install && lerna exec 'rm -rf node_modules package-lock.json' && lerna bootstrap && npm run clean && node ./scripts/postinstall.js"
+    "update:package-lock": "npm install && npm run clean && node ./scripts/postinstall.js"
   },
   "husky": {
     "hooks": {
@@ -23,6 +22,9 @@
     "type": "git",
     "url": "git+https://github.com/google/model-viewer.git"
   },
+  "workspaces": [
+    "./packages/*"
+  ],
   "author": "DevXR Contributors",
   "license": "Apache-2.0",
   "engines": {
@@ -42,7 +44,6 @@
     "eslint-plugin-wc": "^1.3.0",
     "http-server": "^14.1.1",
     "husky": "^7.0.1",
-    "lerna": "^5.6.2",
     "typescript": "4.8.4"
   }
 }