Chaostoolkit-aws

Added

- added new variable for cloudwatch probes `get_metric_statistics` and `get_metric_data`
called `dimensions` to allow for multiple dimension queries
- Added `.github/workflows/check_pr.yaml` which checks if a PR has modified the
CHANGELOG.md and if it changed/added tests
- adding s3 probes `bucket_exists`, `object_exists`, & `versioning_status`
- adding s3 actions `delete_object`, `toggle_versioning`
- explicitly support python 3.9

Added
- adding list_event_source_mapping to awslambda probes
- adding delete_event_source_mapping to awslambda actions
- adding toggle_event_source_mapping_state to awslambda actions
- adding put_metric_data to cloudwatch actions
- added GitHub Actions Workflows for Build and Test, Build and Discover, and Releasing
- added `Makefile` to abstract away common commands: `install`, `install-dev`, `lint`, `format`, `tests`
- added `chaosaws.fis.actions.start_experiment` to start an AWS FIS experiment
- added `chaosaws.fis.actions.stop_experiment` to stop an AWS FIS experiment
- added `chaosaws.fis.probes.get_experiment` to retrieve an AWS FIS experiments details

Removed
- Removed TravisCI related files
- All ` -*- coding: utf-8 -*-` statements
- Python 3.5 support

Changed
- update return value of asg action detach_random_instances to include instance IDs
- switch from `pycodestyle` to `black`, `flake8`, and `isort` for linting/formatting
- applied `black`, `flake8`, and `isort` across the codebase
- applied `pyupgrade --py36-plus`

Fixed
- `chaosaws.route53.probes` now correctly exposes the `__all__` attribute

Added
- adding route53 probes & actions
- adding ssm actions

Changed

Changed

- use setuptools auto discovery of all packages under `chaosaws` to not forget
them anylonger
- turn `chaosaws.emr` into a proper Python package

Added

- adding probes to rds resource (instance_status, cluster_status, cluster_membership_count)
- add Cloudwatch get_metric_data probe
- adding new probes & actions for EMR
- building for Python 3.8

Changed

- fixing `describe_cache_cluster` argument calls ordering
- adding actions to ecs resource ('tag_resource', 'untag_resource', 'set_service_placement_strategy', 'set_service_deployment_configuration', & 'update_container_instances_state')

Added

- adding elasticache probes `describe_cache_cluster`, `get_cache_node_count`, & `get_cache_node_status`
- add EC2 actions to allow/revoke security group ingress