1.0.0 release

[riga]

• [x] Update project packaging
• [x] Drop Python 2 support
• [ ] Polish code (remove deprecated features, type hints, language features)
  • [x] law
    • [x] ./
    • [x] cli
    • [x] job
    • [x] sandbox
    • [x] target
      • [x] ./
      • [x] remote
    • [x] task
    • [x] templates
    • [x] workflow
    • [x] contrib
      • [x] arc
      • [x] awkward
      • [x] cms
      • [x] coffea
      • [x] docker
      • [x] dropbox
      • [x] gfal
      • [x] git
      • [x] glite
      • [x] hdf5
      • [x] htcondor
      • [x] ipython
      • [x] keras
      • [x] lsf
      • [x] matplotlib
      • [x] mercurial
      • [x] numpy
      • [x] profiling
      • [x] pyarrow
      • [x] rich
      • [x] root
      • [x] singularity
      • [x] slack
      • [x] slurm
      • [x] tasks
      • [x] telegram
      • [x] tensorflow
      • [x] wlcg
  • [x] docs
  • [x] tests
  • [ ] examples
    • [ ] docker_sandboxes
    • [ ] dropbox_targets
    • [ ] htcondor_at_cern
    • [ ] htcondor_at_naf
    • [ ] htcondor_at_vispa
    • [ ] loremipsum
    • [ ] lsf_at_cern
    • [ ] notebooks
    • [ ] notifications
    • [ ] parallel_optimization
    • [ ] sequential_htcondor_at_cern
    • [ ] singularity_sandboxes
    • [ ] slurm_at_maxwell
    • [ ] subshell_sandboxes
    • [ ] wlcg_targets
    • [ ] workflow_dynamic
    • [ ] workflow_parameters
    • [ ] workflows
• [ ] Refactor docs (tasks to be expanded)
• [ ] Add core unit tests (tasks to be expanded)

[riga]

Summary of changes

(moving target)

• Dropped Python ≤3.6
• Requires luigi ≥3.2
• Removed deprecated features
• Type hints
• General code changes
  • Using Python ≥3.7 features
  • Some light de-nesting
  • No change in functionality
• API changes
  • Made some arguments keyword-only throughout law