New flag --fpm-options-file path/to/file which allows you to specify additional fpm flags in an external file of your choosing. (#1905, #1902, #1827; Jordan Sissel, Will Furnell, hjpotter92)
deb: Periods are now accepted in package names (#1899; C. Cooke)
Fix bug where fpm would crash if --workdir pointed at a path that didn't
exist. (#1959; Jordan Sissel)
osxpkg: this package format now supports the fpm --prefix flag(#1909, #1908; Jordan Sissel, mcataga)
cpan: Fix bug where fpm would fail on certain Perl modules due to their source tarball structure (#1940; Nicholas Hubbard, William N. Braswell, Jr.)
cpan: Fix crash on certain CPAN modules where the author field was blank (#1942, #1937, #1523, #1528; Nicholas Hubbard, William N. Braswell, Jr.)
deb: The distribution field of the debian changelog and changes files will now use the value set by --deb-dist (default is "unstable") (#1934; Chabert Loïc)
python: Fix errors in how fpm invoked pip. Previously, fpm would use pip's --build flag, but this was removed a while ago, and fpm is now aware! (#1896, #1831, #1893, #1916; Jordan Sissel, Svyatogor Chuykov)
deb: The default --deb-priority is now "optional" instead of "extra" (#1913; Chris Novakovic)
Enable installation of fpm on older versions of ruby. This change removed git rubygem dependency. (#1946, #1923; Jordan Sissel, Andreas Wirooks, Ruslan Kuprieiev, jamshid, Lorenzo Castellino, Sam Hughes)
Enable operation of fpm on very old versions of ruby (as old as Ruby 1.9.3). This changed removed json rubygem dependency. (#1950, #1949, #1741, #1264, #1798, #1800, #1784; Jordan Sissel and many others)
Fix bug where subprocesses could hang waiting for input (#1955, #1519, #1522; Nicholas Hubbard, William N. Braswell, Jr.)
Update Dockerfile to use ubuntu:20.04 (#1935; Gnought)
internal: Fix a code typo (#1948; Nicholas Hubbard)
internal tests: Support newer versions of lintian (#1939, #1907; Jordan Sissel)
Improve support for Ruby 3.1.0 and newer that would previously crash with an error mentioning Psych::DisallowedClass (#1898, #1895; Jordan Sissel, Alexandre ZANNI)
Improve support for Ruby 3.1.0 and newer that changed the API for ERB (#1897; Jordan Sissel)