Invalid JSON prevents SSR render

[cowlingj]

Describe the bug
When a graphql api responds with invalid json the component isn't rendered at all

To Reproduce
Codesandbox: https://codesandbox.io/s/vue-apollo-issue-hnonm

Steps to reproduce the behavior:

1. setup vue and vue apollo with ssr
2. replace apollo client uri with one that does not return json (e.g. nginx default error or https://httpstat.us/500)
3. make request to page
4. notice that the page shows no content

Expected behavior
In the codesandbox example I'd expect "no episodes" to be shown

Versions
vue: 2.6.11
vue-apollo: 3.0.3
apollo-client: 2.6.8 (from apollo-boost: 0.4.7)

Additional context
I think this repo also highlights the same issue using nuxt