fix(notification): mask sensitive data in logs

fix: remove additionnal line break

close #107

fix: bufio.Scanner: token too long

close #98

refactor(config): small config refactoring

- split config structure
- improve config logic
- improve test lib and fix typos

v1.18.0

- Build static binary
- Add default extension parameter

v1.16.0

- add X-WebAuth-User header support
- add X-Forwarded-For header support
- refactor notification package
- add ed5519 HTTP signature support
- refactor truststore package
- add P12 trust store support
- bump dependencies

v1.15.1

- add ARM suport
- create slim Docker image