fix: make bin/t.js runnable
bin: strong-log-transformer to sl-log-transformer

The command was previously used for testing only and is an undocumented feature.
expose option defaults as Logger.DEFAULTS
Add CLI

Used for testing, but also useful in its own right
test: cli --help/--version
doc: initial CLI description
package: make description more concise
Hide tgzs so npm pack doesn't pack itself
0.2.0