fix(common): removing duplicated axios interfaces

- Removed the deprecated package @types/axios.
- Removed the duplicated axios interfaces.
- Updated the HttpService to use the interfaces provided by axios.

Author: Patrick Housley

package-lock.json

@@ -24,7 +24,6 @@
     "@nestjs/microservices": "^4.0.0",
     "@nestjs/testing": "^4.0.0",
     "@nestjs/websockets": "^4.0.0",
-    "@types/axios": "^0.14.0",
     "axios": "^0.17.1",
     "class-transformer": "^0.1.8",
     "class-validator": "^0.8.1",

package.json

@@ -1,16 +1,12 @@
-import axios from 'axios';
+import axios, { AxiosRequestConfig, AxiosResponse } from 'axios';
 import { Observable } from 'rxjs/Observable';
-import {
-  AxiosRequestConfig,
-  AxiosResponse,
-} from './interfaces/axios.interfaces';
 import 'rxjs/add/observable/fromPromise';
 
 export class HttpService {
   request<T = any>(config: AxiosRequestConfig): Observable<AxiosResponse<T>> {
     return Observable.fromPromise(axios.request<T>(config));
   }
-  
+
   get<T = any>(
     url: string,
     config?: AxiosRequestConfig,