Fix CHANGELOG formatting

Author: simonsmith

CHANGELOG.md

@@ -1,12 +1,12 @@
-=== HEAD
+### HEAD
 
 * Switch to Yarn
 
-=== 3.1.0 (October 11, 2017)
+### 3.1.0 (October 11, 2017)
 
 * Allow both `/**` and `/*` for module definitions [#125](https://github.com/postcss/postcss-bem-linter/pull/125)
 
-=== 3.0.0 (July 21, 2017)
+### 3.0.0 (July 21, 2017)
 
 * Update PostCSS to `^6.0.6` - Drops support for Node 0.12
 * Ignore underscore on implicitComponent to allow Scss partials [#115](https://github.com/postcss/postcss-bem-linter/pull/115)
@@ -15,101 +15,101 @@
 * Switch to Jest for unit tests
 * Use Airbnb ESLint configuration
 
-=== 2.7.1 (June 06, 2017)
+### 2.7.1 (June 06, 2017)
 
 * Fix issue with nested rules when using LESS syntax [#114](https://github.com/postcss/postcss-bem-linter/pull/114)
 
-=== 2.7.0 (February 28, 2017)
+### 2.7.0 (February 28, 2017)
 
 * Add implicitComponents and implicitUtilities option ([#93](https://github.com/postcss/postcss-bem-linter/pull/93))
 
-=== 2.6.0 (September 26, 2016)
+### 2.6.0 (September 26, 2016)
 
 * Allow component selector patterns without `{componentName}` interpolation.
 
-=== 2.5.1 (May 1, 2016)
+### 2.5.1 (May 1, 2016)
 
 * Add support for nested selectors in utility stylesheets.
 
-=== 2.5.0 (April 27, 2016)
+### 2.5.0 (April 27, 2016)
 
 * Add support for nested selectors.
 
-=== 2.4.1 (March 28, 2016)
+### 2.4.1 (March 28, 2016)
 
 * Fix preset `componentName` patterns.
 
-=== 2.4.0 (March 3, 2016)
+### 2.4.0 (March 3, 2016)
 
 * Allow chaining modifier classes in SUIT pattern.
 * Allow chaining state classes in SUIT pattern.
 
-=== 2.3.3 (February 15, 2016)
+### 2.3.3 (February 15, 2016)
 
 * Skip nodes that do not have `source` properties.
 
-=== 2.3.2 (February 14, 2016)
+### 2.3.2 (February 14, 2016)
 
 * Prevent failure if a PostCSS node lacks a `source` property.
 
-=== 2.3.1 (February 9, 2016)
+### 2.3.1 (February 9, 2016)
 
 * Ensure that `@keyframes` selectors are always skipped.
 
-=== 2.3.0 (November 24, 2015)
+### 2.3.0 (November 24, 2015)
 
 * Add ability to ignore custom properties via `postcss-bem-linter: ignore` comments and the `ignoreCustomProperties` pattern.
 
-=== 2.2.0 (November 15, 2015)
+### 2.2.0 (November 15, 2015)
 
 * Allow attribute selectors in BEM preset pattern.
 * Fix bug causing pseudo-classes with operators like `:nth-child(3n+1)` to cause problems.
 * Add flexibility (remove unnecessary strictness) in attribute part of preset patterns.
 
-=== 2.1.0 (October 31, 2015)
+### 2.1.0 (October 31, 2015)
 
 * Support string patterns for everything: `componentName`, `componentSelectors` (with one description, and with `initial` and `combined`), `utilitySelectors`, and `ignoreSelectors` (with a single value or an array).
 
-=== 2.0.0 (October 17, 2015)
+### 2.0.0 (October 17, 2015)
 
 * Add namespace option to BEM preset pattern.
 * Light breaking change: Improve strictness of SUIT preset pattern: enforce proper camelCasing.
 
-=== 1.2.0 (October 12, 2015)
+### 1.2.0 (October 12, 2015)
 
 * Support array of patterns for `ignoreSelectors`.
 
-=== 1.1.0 (September 18, 2015)
+### 1.1.0 (September 18, 2015)
 
 * Support selective overriding of a chosen preset's patterns.
 * Support `ignoreSelectors` pattern.
 * Support ignoring utility selectors with a preceding comment.
 * Add helpful error messages when user configuration is lacking patterns.
 
-=== 1.0.1 (August 30, 2015)
+### 1.0.1 (August 30, 2015)
 
 * Use PostCSS's improved warning API to provide more precise locations.
 
-=== 1.0.0 (August 26, 2015)
+### 1.0.0 (August 26, 2015)
 
 * Upgrade to PostCSS 5.
 
-=== 0.6.0 (August 8, 2015)
+### 0.6.0 (August 8, 2015)
 
 * Support multiple definitions per file.
 * Support comments to end definition enforcement.
 * Support verbose comment syntax, e.g. `/* postcss-bem-linter: define ComponentName */`.
 
-=== 0.5.0 (August 5, 2015)
+### 0.5.0 (August 5, 2015)
 
 * Add alternate signature for designating preset and preset options.
 * Remove checks that `:root` rules only contain custom-properties, and that the `:root` selector is not grouped or combined with other selectors. Outsourcing these checks to [stylelint](https://github.com/stylelint/stylelint).
 
-=== 0.4.0 (June 23, 2015)
+### 0.4.0 (June 23, 2015)
 
 * Support `/* postcss-bem-linter: ignore */` comments.
 
-=== 0.3.0 (May 23, 2015)
+### 0.3.0 (May 23, 2015)
 
 * Support BEM format and custom formats.
 * Make `strict mode` the default. Add `weak` mode.
@@ -119,15 +119,15 @@
 * Use postcss 4.1.x.
 * Allow adjoining attributes in SUITCSS selectors.
 
-=== 0.2.0 (January 24, 2015)
+### 0.2.0 (January 24, 2015)
 
 * Use postcss 4.0.x API.
 
-=== 0.1.1 (November 22, 2014)
+### 0.1.1 (November 22, 2014)
 
 * Skip `@keyframes` rules when validating selectors.
 
-=== 0.1.0 (October 2, 2014)
+### 0.1.0 (October 2, 2014)
 
 * Initial release. Ported from rework-suit-conformance.
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