Support options.retries Infintiy

[waspeer]

I bumped into a problem where when passing Infinity as an value for the retries option, it will result into a memory heap overload when it tries to create the array of timeouts. It seems like this option is supposed to be supported. This PR is my proposition on how this could be fixed.

[codecov]

Codecov Report

Merging #77 (1017a56) into master (a7cedfb) will decrease coverage by 1.74%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #77      +/-   ##
==========================================
- Coverage   90.41%   88.66%   -1.75%     
==========================================
  Files           2        2              
  Lines         146      150       +4     
==========================================
+ Hits          132      133       +1     
- Misses         14       17       +3     

Impacted Files	Coverage Δ
lib/retry.js	96.29% <100.00%> (-1.71%)	⬇️
lib/retry_operation.js	84.37% <0.00%> (-2.09%)	⬇️

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