v0.2.0

In this PR, a new environment variable is introduced that control whether to exit on startup error or not. The errors that might cause the plugin to exit are:

1. The Redis URL cannot be parsed.
2. Redis cannot be pinged.

What's Changed

• Add option whether to exit on startup error or not by @mostafa in #55

Full Changelog: v0.1.8...v0.2.0