feat: implementing grpc reflection client

This change adds the ability to create GPRC Clients using
GRPC Reflection Protocol, which is pretty convenient to
make protobuf propagation easier, as it'll only be needed
in the server side! Also, some optional libraries that
were wrongly installed as dependencies, as changed to
devDependencies

.github/workflows/build.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [10.x, 12.x]
+        node-version: [18.x]
     steps:
       - uses: actions/checkout@v2
       - name: Use Node.js ${{ matrix.node-version }}

.nvmrc

@@ -1 +1 @@
-12
+16

README.md

@@ -24,9 +24,9 @@
 npm i @codibre/grpc-base-client
 ```
 
-  
+
 ## How to Use
-  
+
 
 ```typescript
 
@@ -45,16 +45,45 @@ const grpcCLient = new gRPCCLient<Health>({
 	secure: true,
 });
 
-  
+
 
 await grpcCLient.getInstance().Check({service: 'foo'}); // { status: 'SERVING' }
 
 ```
 
-
+## How to retrieve client through reflection
+
+Is your GRPC servers implements [GRPC Reflection Protobol](https://github.com/grpc/grpc/blob/master/doc/server-reflection.md), then you don't need to have a copy of the proto client side and can just get it using it! This package implements a method to create the client using this feature that can be easily used like this:
+
+```ts
+import { Client as gRPCCLient } from '@codibre/grpc-base-client';
+
+interface Health {
+	Check(props: { service: string }): Promise<any>;
+}
+
+const grpcCLient = gRPCCLient.getByReflection<Health>({
+	namespace: 'abc.def',
+	url: 'test.service',
+	maxConnections: 2,
+	service: 'Health',
+	secure: true,
+});
+
+await grpcCLient.getInstance().Check({service: 'foo'}); // { status: 'SERVING' }
+```
+
+Notice that you don't inform the protoFile in this call, as it is not needed. Also, this method don't offers a legacy library switch, as it'll only work with the new @grpc/grpc-js library.
+
+If you want to find out how to implement it on your server, it really pretty easy! Just take a look at the official implementation for NodeJs: [@grpc/reflection](https://www.npmjs.com/package/@grpc/reflection). If you're using **NestJs**, another option is [nestjs-grpc-reflection](https://www.npmjs.com/package/nestjs-grpc-reflection), although the official one is preatty straight forward to use alongside with nestjs too.
+
+To use **getByReflection**, you need to install two optional libraries:
+
+* [grpc-js-reflection-client](https://www.npmjs.com/package/grpc-js-reflection-client)
+* [google-protobuf](https://www.npmjs.com/package/google-protobuf)
 
 ## License
 
-
 
-Licensed under [MIT](https://en.wikipedia.org/wiki/MIT_License).
+
+Licensed under [MIT](https://en.wikipedia.org/wiki/MIT_License).