update readme

Signed-off-by: Utkarsh Srivastava <srivastavautkarsh8097@gmail.com>

Author: tangledbytes

README.md

@@ -6,7 +6,12 @@
 
 nodejs-snowflake is a fast and reliable way to generate time sortable 64 bit ids written for distributed systems.  
 The main id generation function is written in C++ using N-API which makes the process of id generation extremely fast. The usage of C++ for id generation also guaratees that the generated number will be of size 64 bits.  
-**Now Supports machine id extraction from the generated ids, even if they were generated on different machines**
+
+**Version 1.6 Updates**
+- Add `GetIDFromTimestamp` function which can be used in database queries.  
+
+**Version 1.5 Updates**
+- Add `GetMachineIDFromTimestamp` help extracting machine id from the generated ids, even if they were generated on different machines
 
 ## How to install
 
@@ -92,6 +97,18 @@ console.log(mid); // 2345 -> This is the 12 bit long machine id where this token
 
 ```
 
+### Get ID corresponding to a Timestamp
+This can be extremely helpful in writing database queries where the requirement could be to get entries created after a certain timestamp.
+
+```javascript
+...
+
+const id = uid.IDFromTimestamp(Date.now()); // Here id will always be BigInt
+
+console.log(id); // A 64 bit id is returned corresponding to the timestamp given
+
+```
+
 ### Get the current machine id
 This solely exits to find the machine id of current machine in case the user didn't provided as machine id and relied on the randomly generated value.