feat: granular control of client warnings, errors. fixes #55

[shellscape]

• This is a bugfix
• This is a new feature
• This is a code refactor
• This is a test update
• This is a typo fix
• This is a metadata update

For Bugs and Features; did you add new tests?

Yes

Motivation / Use-Case

Fixes #55

Breaking Changes

None

Additional Info

[codecov]

Codecov Report

Merging #56 into master will increase coverage by 0.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #56      +/-   ##
==========================================
+ Coverage   99.27%   99.28%   +0.01%     
==========================================
  Files           3        3              
  Lines         138      140       +2     
==========================================
+ Hits          137      139       +2     
  Misses          1        1

Impacted Files	Coverage Δ
lib/util.js	100% <100%> (ø)	⬆️
index.js	98.71% <100%> (ø)	⬆️

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