Address some of the points in Hugo's review

[nikosbosse]

• available metrics are now exported to the user
• == TRUE statements have been removed. These were now replaced with isTRUE as all.equal doesn't return TRUE/FALSE

[codecov]

Codecov Report

Merging #149 (2d96ec5) into master (29ac025) will not change coverage.
The diff coverage is 60.00%.

❗ Current head 2d96ec5 differs from pull request most recent head 35901b7. Consider uploading reports for the commit 35901b7 to get more accurate results

@@           Coverage Diff           @@
##           master     #149   +/-   ##
=======================================
  Coverage   48.44%   48.44%           
=======================================
  Files          18       18           
  Lines        1348     1348           
=======================================
  Hits          653      653           
  Misses        695      695           

Impacted Files	Coverage Δ
R/eval_forecasts_continuous_integer.R	69.64% <0.00%> (ø)
R/pairwise-comparisons.R	42.36% <0.00%> (ø)
R/plot.R	0.00% <0.00%> (ø)
R/utils.R	63.49% <ø> (ø)
R/bias.R	87.93% <100.00%> (ø)
R/eval_forecasts.R	66.07% <100.00%> (ø)
R/pit.R	56.09% <100.00%> (ø)

---

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 29ac025...35901b7. Read the comment docs.