Add test script [skip ci]

Author: pomber

package.json

@@ -8,8 +8,9 @@
     ]
   },
   "scripts": {
-    "build": "lerna run build",
-    "dev": "lerna run --scope @*/mdx dev",
+    "build": "lerna run --stream build",
+    "test": "lerna run --stream test",
+    "dev": "lerna run --stream --scope @*/mdx dev",
     "storybook": "lerna run --scope storybook start --stream",
     "release": "auto shipit"
   },

packages/mdx/package.json

@@ -39,7 +39,6 @@
     "diff": "^4.0.2",
     "hast-util-to-estree": "^1.4.0",
     "is-plain-obj": "^3.0.0",
-    "mdx-bundler": "^8.0.1",
     "node-fetch": "^2.0.0",
     "remark-rehype": "^8.1.0",
     "shiki": "^0.10.1",
@@ -58,7 +57,7 @@
     "autoprefixer": "^9.8.2",
     "cssnano": "^4.1.10",
     "esbuild": "^0.13.2",
-    "mdx-bundler": "^6.0.1",
+    "mdx-bundler": "^8.0.1",
     "next": "^12.1.0",
     "react": "^17.0.2",
     "react-dom": "^17.0.2",