Updating-and-release-notes.md

-### Current version: `3.0.0b19`
+### Current version: `3.0.0b20`
 
 You can check the version installed by running `obi --version`
 
 ### Release notes:
 
-* `3.0.0b19`: Reworked the installation (and version formatting) to work with pip, and made obi import work with `seq` genbank extension.
+* `3.0.0b20`: Reworked the installation (and version formatting) to work with pip, and made obi import work with `seq` genbank extension (+ other minor import fixes).
 
 * `3.0.0-beta17`: Fixed a bug in `obi import` stopping the program when the last
 line of a fasta file contained a single nucleotide.