Bugfix: nested author groups in Elsevier parser; test updates

• Adjusts how the Elsevier parser treats author groups and their affiliations, using a recursive method for handling nested author groups (e.g. in multi-institution collaborations)
• Standardizes unit test output data so that json files all have indent=2, sort_keys=True
• Adds unit tests for some previously untested JATS files

v0.9.17 - elsevier formatting handling

What's Changed

• fixed subscript, superscript, italics, bold tags for elsevier by @mugdhapolimera in #101

Full Changelog: v0.9.16...v0.9.17

Maintenance release

• Improved pagination handling for non-page electronic ids (PR #100 )

Maintenance release v0.9.15

What's Changed

• added markup handling by @mugdhapolimera in #98

Full Changelog: v0.9.14...v0.9.15

Maintenance release

What's Changed

• Added handling for simple-article by @mugdhapolimera in #93

Full Changelog: v0.9.13...v0.9.14

Maintenance release

Elsevier updates

What's Changed

• Issue 87.20240214 by @seasidesparrow in #89
• Updated Elsevier author name handling by @mugdhapolimera in #91

Full Changelog: v0.9.12...v0.9.13

Maintenance release

Fixes issue with Copernicus parser capturing electronic ISSNs

Maintenance release

What's Changed

• JATS bugfix if article-title is empty by @mugdhapolimera in #82
• Dublincore parser to replace arxiv parser by @mugdhapolimera in #84

Full Changelog: v0.9.10...v0.9.11

Maintenance release

What's Changed

• Jats page count bugfix by @mugdhapolimera in #80

Full Changelog: v0.9.9...v0.9.10

Maintenance release

Includes PR #72 , #73 , #75 , and #77