Plone-releaser

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Bug fixes:


- When reporting interesting commits, catch errors when comparing with previously ignored commit.
Fixes `issue 39 <https://github.com/plone/plone.releaser/issues/39>`_.
[maurits] (39)

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New features:


- Support env var PLONE_RELEASER_MULTI_PACKAGES to signal doing multiple releases.
We still change `checkouts.cfg` and `versions.cfg` in the relevant coredev branches then,
but we do not offer to push them.
[maurits] (37)


Bug fixes:


- Fixed detecting changes in packages that are missing from checkouts.
[maurits] (35)

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Bug fixes:


- Fixed adding a package to checkouts.cfg. [maurits] (30)
- Ask before pushing an updated version when running 'report'. [maurits] (32)

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New features:


- Handle coredev branch 6.0 when releasing packages.
[maurits] (27)


Bug fixes:


- Fixed adding some package versions twice when releasing.
[maurits] (24)

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Bug fixes:


- Fixed Python 3 compatibility. [maurits] (25)

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No significant changes.