Uses generic `is.infinite` that is compatible with previous R versions

[averissimo]

Pull Request

Closes #34

Changes description

• Fix bug reported by @chlebowa as is.infinite.POSIXlt is not available in previous versions of R

[github-actions[bot]]

Code Coverage Summary

Filename                          Stmts    Miss  Cover    Missing
------------------------------  -------  ------  -------  ------------------------
R/check.R                            37      37  0.00%    26-170
R/deps_installation_proposal.R      137     137  0.00%    58-267
R/desc_utils.R                       70      42  40.00%   15-32, 108, 117-167, 185
R/get_ref.R                         208     207  0.48%    13-419, 435-454
R/solve.R                            81      81  0.00%    9-165
R/utils.R                            70      55  21.43%   3-20, 36-111
TOTAL                               603     559  7.30%

Diff against main

Filename      Stmts    Miss  Cover
----------  -------  ------  --------
TOTAL             0       0  +100.00%

Results for commit: b878e87dff08b54dff5b03cf644cb12667a4df9b

Minimum allowed coverage is 80%

:recycle: This comment has been updated with latest results

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Unit Tests Summary

  1 files    4 suites   1s :stopwatch: 41 tests 13 :heavy_check_mark: 28 :zzz: 0 :x: 94 runs  65 :heavy_check_mark: 29 :zzz: 0 :x:

Results for commit 205d3b07.