Update chagelog

CHANGELOG.md

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 # Changelog
 
+**2.0.0** <small>_Jun 20, 2020_</small> - [Diff](https://github.com/bookshelf/processor-plugin/compare/v1.0.0...v2.0.0)
+
+#### Breaking changes
+
+- Requires Node.js 10 or newer: [#13](https://github.com/bookshelf/processor-plugin/pull/13)
+
+#### Dependencies
+
+- Update dev dependencies: [#12](https://github.com/bookshelf/processor-plugin/pull/12), [#13](https://github.com/bookshelf/processor-plugin/pull/13), [#14](https://github.com/bookshelf/processor-plugin/pull/14)
+
 **1.0.0** <small>_Sep 21, 2019_</small>
 
 - Pass model context as 'this' in processors: [#1](https://github.com/bookshelf/processor-plugin/pull/1)