Adding dig to only update when IP changes and better script logic for easier debugging

Includes the following new PRs/Features:

• #13 - Reorganize script logic for easier debugging by @alexander-bauer
• #15 - only update DNS when different by @nicholascioli
• some updates by @dependabot.

v0.4.0

Adding Cloudflare's proxying feature. Remove beta status from batch-kubernetes yaml.

v0.3.0

Use the newly recommended way of interacting with the Cloudflare API with the API_TOKEN option.

v0.2.0

change from bearer token to x-auth-key and x-auth-email.

v0.1.0

Uses a bearer token.