'.import.rio_rdata()' and 'import.rio_rds()' no longer passing '...' …

[bokov]

…to 'load()' nor to 'readRDS()' because those underlying functions cannot accept '...' arguments. Instead, the length of '...' is checked and if > 0 a warning is issued. With corresponding tests. As proposed in #223

Please ensure the following before submitting a PR:

• if suggesting code changes or improvements, open an issue first
  Issue Using the same argument filters as #222 for .import.rio_rdata, .import.rio_xls, and .import.rio_ods #223
• for all but trivial changes (e.g., typo fixes), add your name to DESCRIPTION
• for all but trivial changes (e.g., typo fixes), documentation your change in NEWS.md with a parenthetical reference to the issue number being addressed
  Awaiting guidance.
• if changing documentation, edit files in /R not /man and run devtools::document() to update documentation
  No changes
• add code or new test files to /tests for any new functionality or bug fix
• make sure R CMD check runs without error before submitting the PR

No failures attributable to this PR.

[bokov]

SInce the rds format has the same issue as rdata and they're thematically related I included that too, and did tests for it as well.

[codecov-io]

Codecov Report

Merging #229 into master will increase coverage by 0.08%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #229      +/-   ##
==========================================
+ Coverage   82.43%   82.51%   +0.08%     
==========================================
  Files          18       18              
  Lines         871      875       +4     
==========================================
+ Hits          718      722       +4     
  Misses        153      153

Impacted Files	Coverage Δ
R/import_methods.R	80.41% <100%> (+0.41%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 70d26ca...70fbe9d. Read the comment docs.

[leeper]

Thanks!