Stdout filter plugin for Embulk

Embulk filter plugin to print embulk records to stdout

• Plugin type: filter

• no option

filters:
  - type: stdout

CHANGELOG.md

• Write test

Run example:

$ ./gradlew classpath
$ embulk run -I lib example.yml

Run test:

$ ./gradlew test

Release gem:

$ ./gradlew gemPush