There is a new method, `Specfile.update_version()`, that allows updating spec file version even if it is a pre-release. (#317)

Improved type annotations for `UserList` subclasses. (#299)
Macro definitions gained a new `commented_out` property indicating that a macro definition is commented out. Another new property, `comment_out_style`, determines if it is achieved by using a `%dnl` (discard next line) directive (e.g. `%dnl %global prerelease beta2`) or by replacing the starting `%` with `#` (e.g. `#global prerelease beta2`). (#298)

Sources now have a `valid` property that indicates whether a source is valid in the current context, meaning it is not present in a false branch of any condition. (#295)

Removed dependency on setuptools-scm-git-archive. (#290)

Macro definitions and tags gained a new `valid` attribute. A macro definition/tag is considered valid if it doesn't appear in a false branch of any condition appearing in the spec file. (#276)

`specfile` no longer tracebacks when some sources are missing and can't be _emulated_. In such case the spec file is parsed without them at the cost of `%setup` and `%patch` macros potentially expanding differently than with the sources present. (#271)
Specfile's license in RPM spec file is now confirmed to be SPDX compatible. (#269)

Fixed Packit config to work properly with `propose-downstream` and `pull-from-upstream` jobs. (#261)

Fixed infinite loop when removing macros with `%` in the name. (#244)
Added a possibility to undefine system macros by setting a macro value to `None` in the `macros` argument of the `Specfile` constructor. (#244)
Fixed a bug in processing options of `%prep` macros. For instance, when a quoted string appeared inside an expression expansion, it could lead to improper parsing, rendering the spec file invalid after accessing the options. (#253)

Parsing has been optimized so that even spec files with hundreds of thousands of lines can be processed in reasonable time. (#240)

Specfile library now handles multiple `%changelog` sections. (#230)

Added a new `guess_packager()` function that uses similar heuristics as `rpmdev-packager`, meaning that the `Specfile.add_changelog_entry()` method no longer requires `rpmdev-packager` to guess the changelog entry author. (#220)
The `Specfile.add_changelog_entry()` method now uses dates based on UTC instead of the local timezone. (#223)

Added `Specfile.has_autorelease` property to detect if a spec file uses the `%autorelease` macro. (#221)

Parsing the spec file by RPM is now performed only if really necessary, greatly improving performance in certain scenarios. (#212)
Checked that license is a valid SPDX license.

Fixed a bug that broke parsing in case spec file contained conditionalized macro definitions or similar constructs. (#209)
Specfile no longer depends on rpm-py-installer, it now depends directly on rpm. (#207)

Fixed infinite loop that occured when section options were followed by whitespace. (#197)

Fixed a bug in section parsing that caused sections to be ignored when there were macro definitions spread across the spec file and not cumulated at the top. (#191)