Bumped gradle version to 5.6.4

[casals]

Can't bump to 6.X since 'findbugs' is deprecated after 5.6.4

[skaldarnar]

If nobody (@immortius ?) has any objections here - LGTM!

[keturn]

Would SpotBugs be an acceptable substitute for findbugs? that could be another issue, though.

[casals]

Would SpotBugs be an acceptable substitute for findbugs? that could be another issue, though.

Actually, yes - findbugs is deprecated in gradle 6.x . I tried replacing it at first, but it also required a different config file, more changes in the script, etc - so I chose to bump the gradle version to the last one supporting findbugs for now (which solves the main problem of gradle being "too old").

[skaldarnar]

Does any of you know how the back-and-forth porting is done here in gestalt - I think the change also makes sense for develop.

[keturn]

even with this branch, I get an error about not being able to find findbugs. Makes me doubt it's worth holding back on the gradle version in hopes of supporting it.

A problem occurred evaluating project ':gestalt'.
> Plugin with id 'findbugs' not found.

[casals]

Actually FindBugs hasn't been developed since 2015, so it's more a matter of replacing it with SpotBugs (which uses a different syntax for configuration) or abandoning it at all. Nevertheless, FindBugs is working here with Gradle 5.6.4 - I double-checked the Gradle user guide and the plugin is supported up to version 5.6.x: https://docs.gradle.org/current/userguide/upgrading_version_5.html - perhaps triple-checking it with a fresh install/someone else + changing ti to develop as well (as skald suggested)

[Cervator]

I did the things :-) #84 takes this a step further

[casals]

Yay!! :D