Apollo-link-rest: Type 'RestLink' is missing the following properties from type 'ApolloLink': split, concat

On version 0.8.0-beta.0 the RestLink implementation is broken. I followed this tutorial but the first code block already breaks:

// Create a RestLink for the Github API
const link = new RestLink({ uri: 'https://api.github.com' });

// Configure the ApolloClient with the recommended cache and our RestLink
const client = new ApolloClient({
  cache: new InMemoryCache(),
  link,
}); 

results in the following TypeScript error:

Type 'RestLink' is missing the following properties from type 'ApolloLink': split, concat

details:

{
    "resource": "/*redacted*/src/file.ts",
    "owner": "typescript",
    "code": "2739",
    "severity": 8,
    "message": "Type 'RestLink' is missing the following properties from type 'ApolloLink': split, concat",
    "source": "ts",
    "startLineNumber": 11,
    "startColumn": 3,
    "endLineNumber": 11,
    "endColumn": 7,
    "relatedInformation": [
        {
            "startLineNumber": 17,
            "startColumn": 5,
            "endLineNumber": 17,
            "endColumn": 9,
            "message": "The expected type comes from property 'link' which is declared here on type 'ApolloClientOptions<NormalizedCacheObject>'",
            "resource": "/*redacted*/node_modules/apollo-client/ApolloClient.d.ts"
        }
    ]
}

This behaviour is reproducable on the codesandbox example by upgrading the apollo-link-rest dependency to 0.8.0-beta.0.

Reverting back to v0.7.3 resolves the issue.