To cite package ‘semver’ in publications use:

Harrison J, Živanović M (2017). semver: 'Semantic Versioning V2.0.0' Parser. R package version 0.2.0, https://github.com/johndharrison/semver.

Corresponding BibTeX entry:

  @Manual{,
    title = {semver: 'Semantic Versioning V2.0.0' Parser},
    author = {John Harrison and Marko Živanović},
    year = {2017},
    note = {R package version 0.2.0},
    url = {https://github.com/johndharrison/semver},
  }