Fix make sure the package does not override the bundle

[romainreuillon]

On our build some bundle gets replaced by simple package due to the asynchronicity of the task. This makes sure that the package task is executed before the bundle one.

[mdedetrich]

This is lgtm but lets also see what @eed3si9n says

[eed3si9n]

I honestly don't know how this plugin is being used, so I'd let you decide. I guess something to think about is potential impact of rewiring Compile / packageBin, which might be used by other plugins like sbt-native-packager or sbt-assembly. If so this would be a subtle breaking change that at least should be advertised as such in the release note.

[mdedetrich]

I think its safe to then leave this for a later release so not too much gets released at once.

[mdedetrich]

So due to #93 (comment) I am going to merge this now and then cut a release so that we can verify it fixes the regression that was introduced in 0.9.5

[mdedetrich]

Closing this PR in favour of #95 because I don't have permissions on @romainreuillon branch in order to add a merge commit so this PR can be merged