[BROKEN] Replacing Maven 2 APIs with Maven 3

IMPORTANT

The release unintentionally breaks backward compatibility of internal cache
Please, DON'T USE IT

What's Changed

• Fixing #215: Don't try to read from or write to cache is skipCache is true by @ajarmoniuk in #216
• #208: Don't try to write to cache until we exit gracefully by @ajarmoniuk in #218
• Implemented #219: Adapt to Apache HttpClient Cache by @ajarmoniuk in #221
• Resolves #222: Fixes a bug in HttpClient construction by @ajarmoniuk in #225
• #224, #226: Replacing Maven 2 APIs with Maven 3 by @ajarmoniuk in #227
• Resolves #230: Use concurrent calls in ArtifactMojo by @ajarmoniuk in #229
• Added an example CI config by @ajarmoniuk in #240
• Use locally served resources by @ajarmoniuk in #241
• Resolves #238: Handling download failures by @ajarmoniuk in #239
• Fixed the site target for the project by @ajarmoniuk in #245

New Contributors

• @ajarmoniuk made their first contribution in #216

Full Changelog: 1.6.8...1.7.0