Upgrade to loopback-next 1.0.0, also enabled streaming support

[lhr0909]

Description

We would like to use the package to create gRPC endpoints, but we found a few issues, mostly due to dependency not being up-to-date.

Related issues

• Made Service Calls Async, Added Streaming Support mean-expert-official/protoc-ts#2 as soon as this is merged, I can change@xanthous/protoc-ts back.

Checklist

• New tests added or existing tests modified to cover all changes
• Code conforms with the style
  guide

[raymondfeng]

Please fix the test script to be:

"test": "lb-mocha \"dist/test/unit/**/*.js\" \"dist/test/acceptance/**/*.js\"",

[lhr0909]

@raymondfeng Just fixed.

[lhr0909]

I kinda went ahead and worked on the streaming calls generation. I am using the gRPC types, which they extend from the NodeJS's Readable, Writeable and Duplex streams. Should work just fine.

[raymondfeng]

@lhr0909 Sorry for the long delay. Would you like to rebase it on top of master branch? I have fixed the project dependencies and set up. It would be great to have your streaming support.

Please also sign the CLA - https://cla.strongloop.com/agreements/strongloop/loopback4-extension-grpc