Add a relatively minimal set of linters that raise safe and
mostly un-opinionated issues with the code. It runs
automatically on CI via a github action.
1. use [staticcheck](https://staticcheck.io/) to check the code, and fix some issues.
2. use `go fmt` to format the code.
3. use `go mod tidy` clean the go mod.
Adds Google Cloud PubSub logging for status and results.
This also changes the Write interface for logging modules to add a context.Context (only used by pubsub currently).
Fixes a regression introduced in 2.1.0 in which separate log lines are
no longer output separated by a newline. Now log lines in both output
plugins will do so.
- Refactor configuration for logging to use separate plugins
- Move existing filesystem logging to filesystem plugin
- Create new AWS firehose plugin
- Update documentation around logging
