Added language simplification cache and tz regex optimizations.

[J08nY]

Before (total):

After (total):

Before:

After:

[codecov-io]

Codecov Report

Merging #295 into master will increase coverage by 0.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #295      +/-   ##
==========================================
+ Coverage   94.42%   94.44%   +0.01%     
==========================================
  Files          34       34              
  Lines        2960     2968       +8     
==========================================
+ Hits         2795     2803       +8     
  Misses        165      165

Impacted Files	Coverage Δ
dateparser/utils/__init__.py	85.84% <100%> (+0.79%)	⬆️
dateparser/timezone_parser.py	95.65% <100%> (+0.19%)	⬆️

---

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 2726c47...b663918. Read the comment docs.