Release v3.1.0

## Added
* Respect `UIDefauls` table configuration defined in `LookAndFeel` class.(#11)
* Allow a customization by inheriting `DockingUISettings` class and overide `getDefaults` method.(#11)

### Fixed
* Avoid NPE when drag-n-drop with null hints (#9)

### Changed
* Add GitHub Actions CI
* Add SpotBugs and SpotLess code quality assurance
* Style: spotless code format applied (#8)
* feat: test UI behavior with Assertj-Swing-JUnit (#7)
* refactor: annotate deprecations, avoid access to internal class of other class(#6)
* refactor: avoid redundant casts (#6)
* refactor: DockingDesktop class not to initialize in static context(#12)

CHANGELOG.md

@@ -3,6 +3,8 @@ All notable changes to this project will be documented in this file.
 
 ## [Unreleased]
 
+## [v3.1.0]
+
 ## Added
 * Respect `UIDefauls` table configuration defined in `LookAndFeel` class.(#11)
 * Allow a customization by inheriting `DockingUISettings` class and overide `getDefaults` method.(#11)
@@ -62,7 +64,8 @@ All notable changes to this project will be documented in this file.
 ## v3.0.3
 * Carsten Madsen released v3.0.3
 
-[Unreleased]: https://github.com/omegat-org/vldocking/compare/v3.0.5-2...HEAD
+[Unreleased]: https://github.com/omegat-org/vldocking/compare/v3.1.0...HEAD
+[v3.1.0]: https://github.com/omegat-org/vldocking/compare/v3.0.5-2...v3.1.0
 [v3.0.5-2]: https://github.com/omegat-org/vldocking/compare/v3.0.5-1...v3.0.5-2
 [v3.0.5-1]: https://github.com/omegat-org/vldocking/compare/vldocking-3.0.5...v3.0.5-1
 [v3.0.5]: https://github.com/omegat-org/vldocking/compare/vldocking-3.0.4...vldocking-3.0.5

build.gradle

@@ -12,7 +12,7 @@ plugins {
 }
 
 group = 'org.omegat'
-version = '3.1.0-SNAPSHOT'
+version = '3.1.0'
 
 repositories {
     mavenCentral()