Making @vue/test-utils a peer dependency

Author: Alex Perkins

package-lock.json

@@ -1,7 +1,7 @@
 {
   "name": "@rei/vunit",
   "description": "Write unit tests against your Vue components using mocha and vue-test-utils",
-  "version": "2.2.0",
+  "version": "3.0.0",
   "author": "Alex Perkins <[email protected]>",
   "repository": "https://github.com/rei/vunit",
   "license": "MIT",
@@ -15,11 +15,13 @@
   "engines": {
     "node": ">8.0.0"
   },
+  "peerDependencies": {
+    "@vue/test-utils": "^1.0.0-beta.31"
+  },
   "dependencies": {
     "@babel/core": "^7.8.3",
     "@babel/preset-env": "^7.8.3",
     "@babel/register": "^7.8.3",
-    "@vue/test-utils": "^1.0.0-beta.31",
     "babel-loader": "^8.0.6",
     "babel-plugin-istanbul": "^6.0.0",
     "chokidar": "^3.3.1",