Updating-and-release-notes.md

-### Current version: `3.0.1b19`
+### Current version: `3.0.1b20`
 
 You can check the version installed by running `obi --version`
 
@@ -21,6 +21,10 @@ python3 setup.py install
 
 ### Release notes:
 
+* `3.0.1b20`:
+  - `alignpairedend` and `ngsfilter`: ids of original sequences are now kept in the tags
+<br>
+
 * `3.0.1b19`:
   - `import`: made ngsfilter file parsing more resilient
 <br>