Add ratelimit context to RateLimitError instance (rl_limit, rl_reset)

[ramonsaraiva]

Closes #30

[codecov-io]

Codecov Report

Merging #77 into master will decrease coverage by 0.09%.
The diff coverage is 28.57%.

@@            Coverage Diff            @@
##           master      #77     +/-   ##
=========================================
- Coverage   43.11%   43.02%   -0.1%     
=========================================
  Files          11       11             
  Lines         770      774      +4     
  Branches       36       36             
=========================================
+ Hits          332      333      +1     
- Misses        438      441      +3

Impacted Files	Coverage Δ
pubg_python/clients.py	57.69% <0%> (ø)	⬆️
pubg_python/exceptions.py	72.41% <33.33%> (-7.59%)	⬇️

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