Add ResourceManager overloads of Requires.Argument

[AArnott]

Closes #77

[codecov-commenter]

Codecov Report

Merging #83 (99ca21a) into master (8841ab2) will increase coverage by 0.49%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #83      +/-   ##
==========================================
+ Coverage   90.94%   91.43%   +0.49%     
==========================================
  Files           9        9              
  Lines         276      292      +16     
==========================================
+ Hits          251      267      +16     
  Misses         25       25              

Impacted Files	Coverage Δ
src/Validation/Requires.cs	96.80% <100.00%> (+0.46%)	⬆️

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