Prepare next release

[zorun]

No description provided.

[zorun]

I think it's good to release soon so that @youegraillot 's work on Docker (#919) can be made available.

Some pending changes that I think should also make it into this new release:

• [Performance] Get weight sum along with bills to scale #949 that fixes the rest of the performance issues
• Added Length validator #962 that fixes a validation bug High integer can corrupt demo database #957

And if possible these bugs should be fixed:

• History from previous project is shown #948
• Cospend CSV bills import not working anymore #980
• MAIL_DEFAULT_SENDER format causes a crash on Docker #1005

What do others think?

[zorun]

And I forgot about this bug: #948
But I think we don't have a fix just yet.

[zorun]

Updated with latest changes, the next release number will be 5.2.0 (new features).

[almet]

So we're good to go here, right?

[zorun]

It seems so, thanks a lot @Glandos for fixing the last bugs!

I'll update the release notes and see if we're good to go.

[zorun]

I have updated the release notes and everything looks good, but we have a regression that was just reported: #1005

It should be fixed before releasing, it causes an error with the default config on Docker.

[zorun]

And release 5.2.0 is out!