chore: remove apollo 2.x and downgrade graphql to 15.x

package.json

@@ -19,16 +19,9 @@
     "@vue/apollo-composable": "^4.0.0-alpha.18",
     "@vue/apollo-option": "^4.0.0-alpha.18",
     "@vue/composition-api": "^1.7.0",
-    "apollo": "^2.34.0",
-    "apollo-cache-inmemory": "^1.6.3",
-    "apollo-client": "^2.6.4",
-    "apollo-link": "^1.2.12",
-    "apollo-link-context": "^1.0.18",
-    "apollo-link-error": "^1.1.11",
-    "apollo-link-http": "^1.5.15",
     "core-js": "3",
     "dayjs": "^1.11.3",
-    "graphql": "^16.5.0",
+    "graphql": "^15.8.0",
     "graphql-tag": "^2.12.6",
     "moment": "^2.29.3",
     "node-sass": "^7.0.1",

plugins/apollo.js

@@ -1,22 +1,12 @@
-import { ApolloClient } from 'apollo-client'
-import {
-  InMemoryCache,
-  IntrospectionFragmentMatcher
-} from 'apollo-cache-inmemory'
-import { createHttpLink } from 'apollo-link-http'
-import { setContext } from 'apollo-link-context'
+import { ApolloClient, InMemoryCache, createHttpLink } from '@apollo/client/core'
+import { setContext } from '@apollo/client/link/context'
 import { provide } from '@vue/composition-api'
 import { DefaultApolloClient } from '@vue/apollo-composable'
-import introspectionQueryResultData from '../fragmentTypes.json'
 import { useAuth } from './auth'
 
 const apiUrl = process.env.graphqlApi || '/query'
 
-const fragmentMatcher = new IntrospectionFragmentMatcher({
-  introspectionQueryResultData
-})
-
-const cache = new InMemoryCache({ fragmentMatcher })
+const cache = new InMemoryCache()
 
 const httpLink = createHttpLink({
   uri: apiUrl