[FABN-1504] Type definition improvement (#410)

This patch fixes the type for the "request-timeout" field of the
ConnectionOpts interface as well as the documentation.

Signed-off-by: Taku Shimosawa <taku.shimosawa@hal.hitachi.com>

Author: shimos

fabric-client/lib/Client.js

@@ -362,7 +362,7 @@ const Client = class extends BaseClient {
 	 * @typedef {Object} ConnectionOpts
 	 * @property {string} name - Optional. To gives this remote endpoint a name.
 	 *           The endpoint will be known by its URL if no name is provided.
-	 * @property {string} request-timeout - An integer value in milliseconds to
+	 * @property {number} request-timeout - An integer value in milliseconds to
 	 *    be used as maximum amount of time to wait on the request to respond.
 	 * @property {string} pem - The certificate file, in PEM format,
 	 *    to use with the gRPC protocol (that is, with TransportCredentials).

fabric-client/types/index.d.ts

@@ -125,7 +125,7 @@ declare namespace Client { // tslint:disable-line:no-namespace
 		pem?: string;
 		clientKey?: string;
 		clientCert?: string;
-		'request-timeout'?: string;
+		'request-timeout'?: number;
 		'ssl-target-name-override'?: string;
 		[propName: string]: any;
 	}