fix: fixes vuejs#16 (vuejs#19)

move prettier from devDependencies to dependencies

Author: ygj6

package.json

@@ -39,7 +39,8 @@
     "readline-sync": "^1.4.10",
     "source-map": "^0.6.1",
     "vue-eslint-parser": "^7.6.0",
-    "yargs": "^16.2.0"
+    "yargs": "^16.2.0",
+    "prettier": "^2.3.1"
   },
   "devDependencies": {
     "@types/debug": "^4.1.5",
@@ -54,7 +55,6 @@
     "eslint": "^7.29.0",
     "jest": "^26.1.0",
     "npm-run-all": "^4.1.5",
-    "prettier": "^2.3.1",
     "ts-jest": "^26.1.1",
     "typescript": "^4.1.3"
   },