Missing module and types for node-fetch and ws

[axhamre]

I'm generating clients with the --node flag, and am getting complaints in the generated index.ts about missing modules and typings for node-fetch and ws (see screenshot below).

I've followed the installation instructions in the Gettings started guide and am on version 5.1.7.

And if/when installing module and types for node-fetch and ws, I'm getting:

Type 'Promise' is not assignable to type 'Promise'.
Type 'unknown' is not assignable to type 'GraphQLResponse'.