Chernoff distribution fix

[cgarling]

Fixes #1999. The main fix is to use quantile_newton rather than newton but I also reorganized some of the constants (lookup tables) while I was at it. Tests added as well

[codecov-commenter]

Codecov Report

:x: Patch coverage is 90.32258% with 3 lines in your changes missing coverage. Please review. :white_check_mark: Project coverage is 86.68%. Comparing base (a1b8bb3) to head (8934077).

Files with missing lines	Patch %	Lines
src/univariate/continuous/chernoff.jl	90.32%	3 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2000      +/-   ##
==========================================
+ Coverage   86.28%   86.68%   +0.40%     
==========================================
  Files         146      146              
  Lines        8787     8782       -5     
==========================================
+ Hits         7582     7613      +31     
+ Misses       1205     1169      -36     

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.

:rocket: New features to boost your workflow:

• :snowflake: Test Analytics: Detect flaky tests, report on failures, and find test suite problems.