Deprecate decorators for depends_on and produces.

[tobiasraabe]

No description provided.

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (v4@8f875ed). Click here to learn what that means.
The diff coverage is n/a.

❗ Current head 9c55797 differs from pull request most recent head 2d6b6bf. Consider uploading reports for the commit 2d6b6bf to get more accurate results

@@          Coverage Diff          @@
##             v4     #398   +/-   ##
=====================================
  Coverage      ?   95.16%           
=====================================
  Files         ?       92           
  Lines         ?     8092           
  Branches      ?        0           
=====================================
  Hits          ?     7701           
  Misses        ?      391           
  Partials      ?        0           

Flag	Coverage Δ
end_to_end	82.87% <0.00%> (?)
integration	39.66% <0.00%> (?)
unit	64.82% <0.00%> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.