check on data.tree version, not R version

[lorenzwalthert]

No description provided.

[codecov-io]

Codecov Report

Merging #450 into master will decrease coverage by 0.01%.
The diff coverage is 66.66%.

@@           Coverage Diff            @@
##           master   #450      +/-   ##
========================================
- Coverage   91.02%    91%   -0.02%     
========================================
  Files          36     36              
  Lines        1626   1623       -3     
========================================
- Hits         1480   1477       -3     
  Misses        146    146

Impacted Files	Coverage Δ
R/nested-to-tree.R	100% <100%> (+3.57%)	⬆️
R/communicate.R	90% <50%> (-10%)	⬇️
R/set-assert-args.R	92% <66.66%> (-0.31%)	⬇️

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