## What's Changed

_If you are upgrading: please see [UPGRADING.md]._

[UPGRADING.md]: https://github.com/rhannequin/astronoby/blob/main/UPGRADING.md

 ### Bug fixes

* Fix ecliptic to equatorial epoch ([#56])

[#56]: #56

 ### Features

* Add twilight times ([#49])
* Add interpolation method ([#52])
* Add decimal_hour_to_time util ([#53])
* Calculate leap seconds for an instant ([#54])
* Add `Angle#-@` ([#55])
* Enable equivalence and hash equality to `Observer` ([#57])
* Twilight events dedicated class ([#61])

[#49]: #49
[#52]: #52
[#53]: #53
[#54]: #54
[#55]: #55
[#57]: #57
[#61]: #61

 ### Improvements

* Upgrade bundler from 2.3.11 to 2.5.7 by @dorianmariecom ([#45])
* Drop `BigDecimal` ([#46])
* Bump rake from 13.1.0 to 13.2.0 ([#47])
* Increase Ruby versions support ([#48])
* Bump rake from 13.2.0 to 13.2.1 ([#51])
* Dedicated constants class ([#62])
* Improve accuracy of equation of time ([#63])
* Twilight times better accuracy ([#65])
* Update UPGRADING.md ([#66])
* release: Bump version to 0.4.0 ([#67])

[#45]: #45
[#46]: #46
[#47]: #47
[#48]: #48
[#51]: #51
[#62]: #62
[#63]: #63
[#65]: #65
[#66]: #66
[#67]: #67

 ### Backward-incompatible changes

* More accurate rising, transit and setting times ([#50])
* Observation events dedicated and centralized class ([#60])
* Change `Astronoby::Sun` constructor ([#64])

[#50]: #50
[#60]: #60
[#64]: #64

 ## New Contributors

* @dorianmariecom made their first contribution in [#45]

[#45]: #45

**Full Changelog**: v0.3.0...v0.4.0