Consider using BuidlerPluginError instead of plain errors

[fvictorio]

This isn't exactly a bug, but there wasn't a better option in the templates 😅

buidler-aragon throws plain errors, like this one:

buidler-aragon/src/tasks/publish/parseAndValidateBumpOrVersion.ts

Line 46 in e238f32

throw Error(`Invalid bump from ${prevVersion} to ${nextVersion}`)

It's better to throw BuidlerPluginErrors from Buidler plugins, since that lets buidler give better feedback to the user. Relevant section in the docs: https://buidler.dev/advanced/building-plugins.html#throwing-errors-from-your-plugins

[welcome]

Thanks for opening your first issue in aragonCLI! Someone will circle back soon ⚡