The API doesn't work (almost): most of the returned property values are `null`

There must be something wrong with schemas or the way the individual records are fetched.

1. Go to https://swapi-graphql.netlify.app/
2. Try any query, requesting different fields.
Example:
```gql
query MyQuery {
allPlanets {
edges {
cursor
node {
climates
created
diameter
edited
name
}
}
}
}
```
3. Observe that most of the fields return as `null`
```json
{
"data": {
"allPlanets": {
"edges": [
{
"cursor": "YXJyYXljb25uZWN0aW9uOjA=",
"node": {
"climates": null,
"created": null,
"diameter": null,
"edited": null,
"name": "Tatooine"
}
},
{
"cursor": "YXJyYXljb25uZWN0aW9uOjE=",
"node": {
"climates": null,
"created": null,
"diameter": null,
"edited": null,
"name": "Alderaan"
}
},
{
"cursor": "YXJyYXljb25uZWN0aW9uOjI=",
"node": {
"climates": null,
"created": null,
"diameter": null,
"edited": null,
"name": "Yavin IV"
}
},
...
...
]
}
}
```