Add create query parameter for update document (#189)

Author: Neelterminusdb

docs/api/woqlclient.md

@@ -856,7 +856,7 @@ const response1 = await client.getDocument({"graph_type":"schema","as_list":true
 ```
 
 ## updateDocument
-##### woqlClient.updateDocument(json, [params], [dbId], [message], [lastDataVersion], [getDataVersion]) ⇒ <code>Promise</code>
+##### woqlClient.updateDocument(json, [params], [dbId], [message], [lastDataVersion], [getDataVersion], [create]) ⇒ <code>Promise</code>
 **Returns**: <code>Promise</code> - A promise that returns the call response object or object having *result*
 and *dataVersion* object if ***getDataVersion*** parameter is true, or an Error if rejected.  
 
@@ -868,6 +868,7 @@ and *dataVersion* object if ***getDataVersion*** parameter is true, or an Error
 | [message] | <code>\*</code> | the update commit message |
 | [lastDataVersion] | <code>string</code> | the last data version tracking id. |
 | [getDataVersion] | <code>boolean</code> | If true the function will return object having result and dataVersion. |
+| [create] | <code>boolean</code> | If true, the function will create a new document if it doesn't exist. |
 
 **Example**  
 ```javascript

lib/woqlClient.js

@@ -1150,6 +1150,7 @@ WOQLClient.prototype.getDocument = function (params, dbId, branch, lastDataVersi
  * @param {string} [lastDataVersion] the last data version tracking id.
  * @param {boolean} [getDataVersion] If true the function will return object having result
  * and dataVersion.
+ * @param {boolean} [create] If true, the function will create a new document if it doesn't exist.
  * @returns {Promise}  A promise that returns the call response object or object having *result*
  * and *dataVersion* object if ***getDataVersion*** parameter is true, or an Error if rejected.
  * @example
@@ -1210,10 +1211,11 @@ WOQLClient.prototype.getDocument = function (params, dbId, branch, lastDataVersi
     );
  */
 
-WOQLClient.prototype.updateDocument = function (json, params, dbId, message = 'update document', lastDataVersion = '', getDataVersion = false, compress = false) {
+WOQLClient.prototype.updateDocument = function (json, params, dbId, message = 'update document', lastDataVersion = '', getDataVersion = false, compress = false, create = false) {
   const docParams = params || {};
   docParams.author = this.author();
   docParams.message = message;
+  docParams.create = create;
   if (dbId) {
     this.db(dbId);
   }