make dgraph-js compatible grpc-js

[shynome]

make dgraph-js compatible grpc-js

I have replace grpc with @types/grpc-js which don't need compile and that is work without change my project code

I have published a package @shynome/dgraph-js that can replace grpc package with @grpc/grpc-js, you can use the commad replace current dgraph-js and grpc package, and your project will work as expected

the command: yarn add dgraph-js@npm:@shynome/dgraph-js grpc@npm:@grpc/grpc-js

---

This change is 

[claassistantio]

All committers have signed the CLA.

[Aelbannan]

Thanks for pushing this. So what benefit does this PR offer? Faster compile times?

[shynome]

grpc-js has no complie times

[Aelbannan]

Makes sense. I'll run this by the maintainer of this repo

[paulftw]

What is this magic number 4?

[shynome]

I don't know this flag how to work and grpc-js module don't have implemented this flag, so I set the value same as grpc module grpc.propagate.DEFAULTS value 4

[paulftw]

@shynome I think something is missing in this PR. Github only shows me a DEFAULTS check and no significant changes to package.json -- I don't see where the grpc-js dependency is added and/or enabled. Can you please elaborate?

[shynome]

this pr not add grpc-js , just for compatible npm alias grpc@npm:@grpc/grpc-js
this pr have done below things

• move gprc libary to devDependencies field, let user can choose which grpc libary they favorite
• add magic number 4 for compatible grpc-js