Added async functions

Author: ip2location

docs/source/code.md

@@ -12,13 +12,26 @@ Load the IP2Location BIN database for lookup.
 :param str binPath: (Required) The file path links to IP2Location BIN databases.
 ```
 
+```{py:function} openAsync(binPath)
+Load the IP2Location BIN database for lookup asynchronously.
+
+:param str binPath: (Required) The file path links to IP2Location BIN databases.
+```
+
 ```{py:function} getAll(ipAddress)
 Retrieve geolocation information for an IP address.
 
 :param str ipAddress: (Required) The IP address (IPv4 or IPv6).
 :return: Returns the geolocation information in array. Refer below table for the fields avaliable in the array
 :rtype: array
 
+{py:function} getAllAsync(ipAddress)
+Retrieve geolocation information for an IP address asynchronously.
+
+:param str ipAddress: (Required) The IP address (IPv4 or IPv6).
+:return: Returns the geolocation information in a Promise of an array. Refer below table for the fields avaliable in the array
+:rtype: Promise of an array
+
 **RETURN FIELDS**
 
 | Field Name       | Description                                                  |

docs/source/quickstart.md

@@ -52,6 +52,30 @@ for (var x = 0; x < testip.length; x++) {
 ip2location.close();
 ```
 
+### Query geolocation information from BIN database asynchronously
+
+You can asynchronously query the geolocation information from the IP2Location BIN database as below:
+
+```javascript
+
+const {IP2Location} = require("ip2location-nodejs");
+
+let ip2location = new IP2Location();
+
+testip = ['8.8.8.8', '2404:6800:4001:c01::67'];
+
+ip2location.openAsync("./DB26.BIN").then(() => {
+	for (var x = 0; x < testip.length; x++) {
+		ip2location.getAllAsync(testip[x]).then(result => {
+			for (var key in result) {
+				console.log(key + ": " + result[key]);
+			}
+			console.log("--------------------------------------------------------------");
+		});
+	}
+});
+```
+
 ### Processing IP address using IP Tools class
 
 You can manupulate IP address, IP number and CIDR as below:

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "ip2location-nodejs",
-	"version": "9.5.0",
+	"version": "9.6.0",
 	"description": "IP2Location geolocation component",
 	"keywords": [
 		"ip2location",