[Enhancement] Caching

[jrandolf]

• A new Cache class is now available to use for caching. You can set this in the cache option for a Serializer (use true if you want the built in cache).
• With caching, there is a ~586% speed improvement (412,768 ops/sec over the previous 70,435 ops/sec). Without-caching rates have stayed the same.

[codecov[bot]]

Codecov Report

Merging #7 into master will decrease coverage by 2.80%. The diff coverage is 78.49%.

@@            Coverage Diff             @@
##           master       #7      +/-   ##
==========================================
- Coverage   92.30%   89.49%   -2.81%     
==========================================
  Files          17       18       +1     
  Lines         364      419      +55     
  Branches      115      124       +9     
==========================================
+ Hits          336      375      +39     
- Misses          8       18      +10     
- Partials       20       26       +6     

Impacted Files	Coverage Δ
src/classes/cache.ts	50.00% <50.00%> (ø)
src/classes/serializer.ts	88.27% <76.31%> (-4.64%)	:arrow_down:
src/utils/serializer.utils.ts	95.16% <96.87%> (+4.25%)	:arrow_up:
src/index.ts	100.00% <100.00%> (ø)
src/classes/paginator.ts	81.81% <0.00%> (+9.09%)	:arrow_up:

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update 3df6511...1153483. Read the comment docs.