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Merge pull request #58 from ropensci/fix/cran-n-cores

Fix/CRAN n cores notes

fix links to PRs

update news

update codemeta.json

update cran-comments

cran release

add CRAN-RELEASE

Merge pull request #25 from ropensci/bug/edge-names-error

fix edge_dist and edge_nn names warnings+error

Merge pull request #24 from ropensci/enhancement/drop-timegroup-null

Enhancement/drop timegroup null