Add 3GPP TS 29.219 V15.3.0 (2019-09) Add AVPs: - Pending-Policy-Counter-Information, Grouped, code 2905, section 5.3.5 - Pending-Policy-Counter-Change-Time, Time, code 2906, section 5.3.6 - Policy-Counter-Identifier, UTF8String, code 2901, section 5.3.1 - Policy-Counter-Status, UTF8String, code 2902, section 5.3.2 - Policy-Counter-Status-Report, Grouped, code 2903, section 5.3.3 - SL-Request-Type, Enumerated, code 2904, section 5.3.4 - SN-Request-Type, Unsigned32, code 2907, section 5.3.7

The digested changelog can be found under:
 contrib/debian/changelog
 
You can also find the exhaustive list of change using mercurial history, 
or at the following URL: http://www.freediameter.net/hg/freeDiameter/shortlog