feat: release new parser

BREAKING CHANGE:

This changes the parser to support any tags
as long as they are correctly formatted.

All tags are put into arrays.

The ER tag is allowed to miss the trailing space
after the dash.

Special formatting rules for some tags are
supported but not enforced.

Other changes include

* There is no default export anymore.
  To parse content call the parser function.

* Log a message instead of throwing an exception
  when content cannot be parsed.

README.md

@@ -1,3 +1,7 @@
+![GitHub Workflow Status](https://img.shields.io/github/workflow/status/customcommander/ris/continuous%20integration)
+![npm (scoped)](https://img.shields.io/npm/v/@customcommander/ris)
+![npm bundle size (scoped)](https://img.shields.io/bundlephobia/min/@customcommander/ris)
+
 # RIS
 
 Read/write bibliographic records in [RIS format][].