refactor!: migration to typescript

[ghost]

The branch was renamed to main in the .github workflows already.

Also adding the previous commit messages that were not captured at merge:

fix: determine the degree from max power, not power length
refactor!: use named exports to ease transition to typescript
feat: allow users to pass interceptAtZero parameter
test: add tests for the new parameter
chore: update all depenencies
refactor: regress does not need us to pass the class anymore.
docs: add flags to the readme
chore: add missing dep

@lpatiny

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (c9b0913) 97.53% compared to head (464a657) 97.76%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main       #8      +/-   ##
==========================================
+ Coverage   97.53%   97.76%   +0.23%     
==========================================
  Files           1        1              
  Lines          81      179      +98     
  Branches       18       30      +12     
==========================================
+ Hits           79      175      +96     
- Misses          2        4       +2     

Files	Coverage Δ
src/index.ts	97.76% <100.00%> (ø)

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