Update builtin CodepointSet tables based on Unicode 14.0 (#19)

[byllyfish]

Fix #19
Add more tests.
Add tests for more versions of unicodedata2.

[codecov-commenter]

Codecov Report

Merging #20 (a50b52f) into master (f0c6cfe) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master      #20   +/-   ##
=======================================
  Coverage   99.14%   99.14%           
=======================================
  Files          10       10           
  Lines         468      468           
=======================================
  Hits          464      464           
  Misses          4        4           

Impacted Files	Coverage Δ
precis_i18n/unicode.py	100.00% <100.00%> (ø)

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