[DRE-maint] ruby-spreadsheet is marked for autoremoval from testing

[Debian testing autoremoval watch]

ruby-spreadsheet 1.0.0-1 is marked for autoremoval from testing on 2020-04-07

It (build-)depends on packages with these RC bugs:
952043: ruby-ole: FTBFS: ERROR: Test "ruby2.7" failed: /<<PKGBUILDDIR>>/lib/ole/storage/base.rb:352:in `<class:Storage>': superclass mismatch for class Header (TypeError)