Rearrange CHANGELOG to reveal 'non-internal' features

Signed-off-by: David Pordomingo <[email protected]>

Author: dpordomingo

CHANGELOG.md

@@ -5,12 +5,12 @@
 ### Changed
 
 - Superset was updated to v0.34.1, which brings some bug fixes. See more details in [their changelog](https://github.com/apache/incubator-superset/blob/master/CHANGELOG.md#0341-20190927-1822-0000) ([#278](https://github.com/src-d/sourced-ui/issues/278)).
+- Make the current source{d} palettes accessible for color blindness impairments ([#302](https://github.com/src-d/sourced-ui/issues/302))
+- Convert the current `srcdMain` and `srcdAll` palettes into interlaced ones, and rename the old gradient ones as `srcdMainGradient` and `srcdAllGradient` ([#305](https://github.com/src-d/sourced-ui/pull/305))
 
 ### Internal
 
 - Reduce the size of docker image ([#272](https://github.com/src-d/sourced-ui/issues/272))
-- Make the current source{d} palettes accessible for color blindness impairments ([#302](https://github.com/src-d/sourced-ui/issues/302))
-- Convert the current `srcdMain` and `srcdAll` palettes into interlaced ones, and rename the old gradient ones as `srcdMainGradient` and `srcdAllGradient` ([#305](https://github.com/src-d/sourced-ui/pull/305))
 
 ### Fixed