Various prediction-related changes

[topepo]

closes #156

closes #123

Re-wrote glmnet prediction parts with more error traps

[codecov-io]

Codecov Report

Merging #157 into master will decrease coverage by 0.3%.
The diff coverage is 72.27%.

@@            Coverage Diff             @@
##           master     #157      +/-   ##
==========================================
- Coverage   73.05%   72.75%   -0.31%     
==========================================
  Files          35       35              
  Lines        2598     2650      +52     
==========================================
+ Hits         1898     1928      +30     
- Misses        700      722      +22

Impacted Files	Coverage Δ
R/predict_quantile.R	70.58% <33.33%> (-7.99%)	⬇️
R/predict_numeric.R	69.56% <50%> (-5.44%)	⬇️
R/predict_raw.R	75% <50%> (-7.36%)	⬇️
R/predict_interval.R	73.68% <60%> (-7.57%)	⬇️
R/logistic_reg.R	66.94% <65%> (-3.06%)	⬇️
R/predict_class.R	77.27% <66.66%> (-6.94%)	⬇️
R/predict_classprob.R	68.18% <66.66%> (-5.51%)	⬇️
R/multinom_reg.R	78.37% <72.72%> (-1.63%)	⬇️
R/predict.R	77.52% <82.35%> (+1.52%)	⬆️
R/linear_reg.R	78.64% <95%> (+4.77%)	⬆️

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[github-actions]

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