Add Major and Minor changes sections in changelog entry

CHANGELOG.md

@@ -1,11 +1,16 @@
 # 0.2.0
 
+#### Major changes
+
+- Flatten provided values in `Arx::Paper`'s field instance methods (allow an array as the `values` splat parameter). ([#5](https://github.com/eonu/arx/pull/5))
+- Add `Arx.find` and `Arx.get` as aliases for `Arx.search`. ([#6](https://github.com/eonu/arx/pull/6), [#8](https://github.com/eonu/arx/pull/8))
+
+#### Minor changes
+
 - Add `homepage` and `metadata` fields to `arx.gemspec`. ([#1](https://github.com/eonu/arx/pull/1), [#14](https://github.com/eonu/arx/pull/14))
 - Specify required ruby version (`~> 2.5`) in `arx.gemspec`. ([#2](https://github.com/eonu/arx/pull/2))
 - Add badges to `README.md`. ([#3](https://github.com/eonu/arx/pull/3), [#9](https://github.com/eonu/arx/pull/9))
 - Fix documentation for `Arx::Paper`'s field methods `exact` argument. ([#4](https://github.com/eonu/arx/pull/4))
-- Flatten provided values in `Arx::Paper`'s field instance methods (allow an array as the `values` splat parameter). ([#5](https://github.com/eonu/arx/pull/5))
-- Add `Arx.find` and `Arx.get` as aliases for `Arx.search`. ([#6](https://github.com/eonu/arx/pull/6), [#8](https://github.com/eonu/arx/pull/8))
 - Update documentation links in `arx.gemspec` and `README.md`. ([#7](https://github.com/eonu/arx/pull/7))
 - Remove newline from end of `Gemfile`. ([#11](https://github.com/eonu/arx/pull/11))
 - Add ruby-head version to RVM rubies in `.travis.yml`. ([#12](https://github.com/eonu/arx/pull/12))