cran fixes

[bczernecki]

Addressing issues found during latest CRAN submission

[codecov]

Codecov Report

Attention: Patch coverage is 78.57143% with 6 lines in your changes missing coverage. Please review.

Project coverage is 83.71%. Comparing base (a00fa13) to head (6ec6fd3).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
R/hydro_imgw_daily.R	50.00%	1 Missing ⚠️
R/hydro_imgw_monthly.R	0.00%	1 Missing ⚠️
R/meteo_noaa_co2.R	0.00%	1 Missing ⚠️
R/nearest_stations_ogimet.R	0.00%	1 Missing ⚠️
R/ogimet_hourly.R	50.00%	1 Missing ⚠️
R/stations_ogimet.R	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #98      +/-   ##
==========================================
+ Coverage   82.80%   83.71%   +0.91%     
==========================================
  Files          32       32              
  Lines        1756     1750       -6     
==========================================
+ Hits         1454     1465      +11     
+ Misses        302      285      -17     

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[Nowosad]

Two examples failed when no internet was available: I removed/commented them out.