Merge pull request #6 from pamburus/feature/jitter

fix: random source for jitter

Merge pull request #5 from ssgreg/feature/with

Feature/with

Merge pull request #4 from ssgreg/feature/fix-exp-backoff

fix: exponential backoff float64 overflow

add: Once and FnRepeat to Repeater and global functions

fix: misprint

add new interface Repeater, Wrap for repeater, WithContext

fix misspelled words