Fix 104

[sangeetabhatia03]

This PR fixes #104; I am now using readr to read in the mapping from parameter names to short parameter names.

Checklist:

• [X ] I have added new dependencies in DESCRIPTION
• [X ] I have bumped the version number in DESCRIPTION
• [ X] I have updated the NEWS.md
• [ NA] I have added unit tests using testthat
• [ NA] I have checked that the package can install locally using devtools::install_local("<path-to-epireview>")
• [ NA] I have added documentation where required
• [ NA] My documentation includes examples of how to use the function
• [ NA] If necessary, I have updated priority-pathogens

[CosmoNaught]

Passes tests and checks, all good.

[CosmoNaught]

Propose that perhaps @sangeetabhatia03 if we have varying delimiters we move all read_csv() to read_delim() so that we can handle multiple delimiters without coding for exceptions. Not urgent, but relates to lowering our dependency footprint and variability in function convention.