Simplify node version retrieval

Author: darseen

src/amadeus/client.js

@@ -174,7 +174,7 @@ class Client {
       params: params,
       bearerToken: bearerToken,
       clientVersion: this.version,
-      languageVersion: process.version,
+      languageVersion: process.versions.node,
       appId: this.customAppId,
       appVersion: this.customAppVersion,
       port: this.port,

src/amadeus/client/request.js

@@ -33,7 +33,7 @@ class Request {
     this.queryPath       = this.fullQueryPath();
     this.bearerToken     = options.bearerToken;
     this.clientVersion   = options.clientVersion;
-    this.languageVersion = options.languageVersion.replace('v', '');
+    this.languageVersion = options.languageVersion
     this.appId           = options.appId;
     this.appVersion      = options.appVersion;
     this.headers         = {