[ANNOUNCE] Groovy 2.4.20, 2.5.13, and 3.0.5 Windows installers released

[Keegan Witt]

2.4.20:
https://bintray.com/groovy/Distributions/download_file?file_path=groovy-2.4.20.msi
2.5.13:
https://bintray.com/groovy/Distributions/download_file?file_path=groovy-2.5.13.msi
3.0.5:
https://bintray.com/groovy/Distributions/download_file?file_path=groovy-3.0.5.msi

-Keegan