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

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