Missing dependency on phpoffice/phpspreadsheet in 2.6.3

[kdambekalns]

This is what packagist knows about 2.6.2:

And this is what packagist knows about 2.6.3:

The reason is tagging on the wrong branch…

[kdambekalns]

This has happened (in similar form) with 2.5.2, which was released from 2.0 and later superseded by 2.5.3 from the 2.5 branch.

2.6.0, 2.6.1 and 2.6.2 were released from master, but 2.6.3 from 2.0.

Reason was (as it seems) the merge of #38 into 2.0 and not realising that 2.0 was no longer active. So 2.0 should then have been merged into 2.5. Then a release of 2.5.4 from 2.5 would have been good. Another upmerge into master, release 2.6.3 from there.

Bottom line: what is 3.0.0 should be 2.6.3 🤷‍♂️

To fix this…

• either tag 3.0.0 also as 2.6.4 (I don't see why the difference between 2.6.2 and 3.0.0 is breaking)
• or create a 2.6 branch at 0fa0821
  ed9a369, add the fix from BUGFIX: Pass empty array as fallback to setContentDimensions() #38 to it and release 2.6.4 from that branch.

Optionally delete the 2.0, 2.5 (and 2.6) branches to avoid such confusion in the future. If needed a 2.x branch can be created "for future use"… 😎