Possibility to write date besides versions

Hi, It would be great if there would be a possibility to write date of release besides version in Changelog when executing patchChangelog task. So, currently when executing patchChangelog task on this changelog:

# Changelog
All notable changes to this project will be documented in this file.

## [Unreleased]

### Added
- Some other thing added.

## [1.0.0] - 2020-07-02

### Added
- Something added.

new change record is added as follows:

# Changelog
All notable changes to this project will be documented in this file.

## [Unreleased]

## [1.0.1]

### Added
- Some other thing added.

## [1.0.0] - 2020-07-01

### Added
- Something added.

where 1.0.1 is a version without date (which must be added manually). Perfect output of patchChangelogfor this case would be:

# Changelog
All notable changes to this project will be documented in this file.

## [Unreleased]

## [1.0.1] - 2020-07-02

### Added
- Some other thing added.

## [1.0.0] - 2020-07-01

### Added
- Something added.

[hsz]

Ok, there was a problem with parsing of the [Unreleased] header. By default, unreleasedTerm is set to Unreleased which doesn’t match [Unreleased] so plugin tried to parse it as a version header.

https://github.com/JetBrains/gradle-changelog-plugin/blob/021db6d12ead7ad51a7c7f157a8de8fc37096a9d/src/main/kotlin/org/jetbrains/changelog/Changelog.kt#L29-L38

I’ve provided better error handling and changed the default unreleasedTerm to [Unreleased]. Please upgrade the plugin dependency to 0.3.3.

[hsz]

Looks like one of the header (marked with ##) doesn’t match this format.

I’ll have to provide better error messages anyway.

I can’t verify it since I’m out of the grid till the end of the week. I’ll be able to check it on Monday.