Version 1.1

Version 1.1, released 2022-12-26

• Add the efilename() function as equivalent to the Oracle BFILENAME() function
• Add regression tests, must be run as postgres user.
• Improve Makefile and detect minimum version of PostgreSQL requirement.
• Update Copyright and authors list.
• Fix make install error about file README.external_file. Thanks to xinferum for the patch.

Version 1.0

Initial release.