5 - Move PostCSS from `peerDependencies` to `dependencies`.
6 - Drop support for Node 0.12.
10 - Upgrade to PostCSS v6. (If you still use PostCSS v5, stick with v3 until you can upgrade your PostCSS.)
11 - Switched PostCSS to a peer dependency.
15 - Replace `clearMessages` option with `clearReportedMessages` and `clearAllMessages`.
19 - Only log warning messages (`type: "warning"`) by default.
22 - Add `filter` option.
23 - Add blacklist functionality to `plugins` option with `!` prefix`.
26 - Fix regression that caused positions from sources without incoming sourcemaps not to be logged.
29 - Find more accurate positions of preprocessed files with sourcemaps.
32 - Fix Windows path bug.
35 - Check individual messages for distinct sources, then group messages by those sources,
36 instead of always using the PostCSS Result's source.
37 - Output empty string from `formatter` if there are no messages, instead of `undefined`.
40 - Handle variable and absent input sources.
43 - Add `noIcon` and `noPlugin` options to both reporter and formatter.
46 - Use PostCSS 5's line/column properties on warnings, instead of relying on the source node.
49 - Upgrade to PostCSS 5.
52 - Add `positionless` option (to both the reporter and the formatter), with default value `"first"`.
53 - Cleaner npm install (files specified in `package.json`).
56 - Remove leftover debugging log statement.
59 - Add `sortByPosition` option (to both the reporter and the formatter), with default value `true`.
62 - Alter `defaultFormatter` to use warning symbol and not repeat `# postcss-reporter`.