MRG: Start 0.10 dev cycle

[hoechenberger]

Merge checklist

Maintainer, please confirm the following before merging:

• All comments resolved
• This is not your own PR
• All CIs are happy
• PR title starts with [MRG]
• whats_new.rst is updated
• PR description includes phrase "closes <#issue-number>"

[codecov]

Codecov Report

Merging #920 (ccef477) into main (bda32f3) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #920   +/-   ##
=======================================
  Coverage   94.78%   94.78%           
=======================================
  Files          23       23           
  Lines        3488     3488           
=======================================
  Hits         3306     3306           
  Misses        182      182           

Impacted Files	Coverage Δ
mne_bids/__init__.py	100.00% <100.00%> (ø)

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