Update node version and fix vue version

.tool-versions

@@ -1,2 +1,2 @@
-nodejs 12.22.1
+nodejs 14.20.1
 python 3.8.13

client/package.json

@@ -131,8 +131,8 @@
     "whatwg-fetch": "^3.0.0"
   },
   "engines": {
-    "node": ">= 12.0.0",
-    "npm": ">= 6.0.0"
+    "node": ">= 14.x",
+    "yarn": ">= 1.x"
   },
   "browserslist": [
     "> 1%",
@@ -140,6 +140,6 @@
     "not ie <= 8"
   ],
   "resolutions": {
-    "graphql": "16.3.0"
+    "vue": "2.6.14"
   }
 }

package.json

@@ -7,6 +7,6 @@
     "build": "npm install --prefix client && npm run build --prefix client"
   },
   "engines": {
-    "node": "12.x"
+    "node": "14.x"
   }
 }