18.0 mig account invoice start end dates

[fredericgrall]

[xaviedoanhduy]

could you squash 2 commit MIG to 18.0 in a single one and btw squash administrative commits?

https://github.com/OCA/maintainer-tools/wiki/Merge-commits-in-pull-requests#mergesquash-the-commits-generated-by-bots-or-weblate

[xaviedoanhduy]

hi @fredericgrall, I created #309 to follow-up on your PR with the needed changes.

[github-actions[bot]]

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