Upgrade CI & build (#56)

* ci: upgrade ci runners

* test: pass all new tests

Cli improvements (#18)

* Update dependencies

* Don't test the language for type safety

* Isolate bug #10

* build: bump dependencies

* refactor: standardise namespace
for #17

* refactor: type improvements
closes #17

Comment-only (empty) crontabs do not break (#13)

* Update dependencies

* Don't test the language for type safety

* Isolate bug #10

* Typo

* Skip comments earlier
Fix #10

* No need to double check line length

* Update Cli release

* Improve type safety

Remove Github Actions from master

Add --now flag to run all tasks at start, closes #9

Add --now flag to run all tasks at start, closes #9

Tidy up code

Tidy up code

Tidy up code

Test validate script runs without failure