Release v1.5.7

to use burrunan/gradle-cache-action

Signed-off-by: Hiroshi Miura <miurahr@linux.com>

Release v1.5.3

### FIXED
- CI: release script affected by changing to setup-java@2.1.0

### Added
- Enable dependabot

### Removed
- Remove Plugin-Id property.

### Changed
- Drop configuration of jCenter
- Bump Gralde@6.9
- Bump Kotlin(JVM)@1.5.0
- Bump gradle-plugin-publish@0.14.0
- Bump dokka@1.4.32
- CI: Bump setup-java@2.1.0
- CI: Bump upload-artifact@2.2.3
- CI: Bump checkout@2.3.4

Signed-off-by: Hiroshi Miura <miurahr@linux.com>

Release v1.5.0

- Add Plugin-Id property.

- Retrieve OmegaT and related packages from MavenCentral(moved).

Signed-off-by: Hiroshi Miura <miurahr@linux.com>

Release v1.4.2

Prepare for v1.4.2

- Support several properties for plugin
  * Use plugin.category and plugin.link
  * Generate Created-By and Plugin-Date
- Provide Dokka javaDoc

Signed-off-by: Hiroshi Miura <miurahr@linux.com>

Release v1.4.1

Fix typo at Plugin-Name in manifest(v1.4.1)

Signed-off-by: Hiroshi Miura <miurahr@linux.com>

Release v1.4.0

Prepare for release v1.4.0

Signed-off-by: Hiroshi Miura <miurahr@linux.com>

Release v1.3.2

Signed-off-by: Hiroshi Miura <miurahr@linux.com>

Release v1.3.1

Signed-off-by: Hiroshi Miura <miurahr@linux.com>

Release v1.2.5

Added

• Add vldocking as dependency

Release v1.2.4

Fixed

• CI: build and release with Java8