4.0.0-rc.0

• Breaking: Drops support for Node 0.12, we now require at least Node 4.
• Breaking: Update PostCSS to 6.0.0.
• Breaking: Removes the deprecated options from version 2.2.0.

2.6.1

• Resolves an issue where IE hacks were being removed from 0 values
  (thanks to @Justineo).

2.6.0

• Added clamping of the values for the shape-image-threshold property, using
  the same logic as introduced in version 2.5.0.

2.5.0

• Added clamping of the values for the opacity property to the 0-1 range.
  For example, this will convert opacity: 1.1 to opacity: 1.

2.4.1

• Resolves an issue where the units would be stripped from zero values in
  custom properties (thanks to @jgerigmeyer).

2.4.0

• Added a precision option to enable rounding of decimal places for
  px values.

2.3.6

• Resolves an issue with the last patch where height: 0em was not being
  converted to height: 0.

2.3.5

• Resolves an issue where certain properties inside @keyframes rules would
  break animation in IE due to the percentage being stripped. Now, the
  percentage is preserved for these properties.

2.3.4

• Does not convert height:0% to height:0 (and the same for max-height), as
  they produce different results.

2.3.3

• Updates postcss-value-parser to version 3 (thanks to @TrySound).

2.3.2

• Fixed a regression where 0% in color functions was being transformed to 0
  (thanks to @TrySound).

2.3.1

• Fixed a behaviour where 0deg was being converted to 0.

2.3.0

• Added an option to convert between turn & deg (thanks to @TrySound).

2.2.1

• Fixes a behaviour where the module would remove units from zero values inside
  calc functions (thanks to @marek-saji & @TrySound).

2.2.0

• Renames opts.convertLength & opts.convertTime to
  opts.length & opts.time; the old options will now print deprecation
  warnings (thanks to @TrySound).

2.1.0

• Adds options to enable/disable unit conversion for time & length values.

2.0.1

• Bump postcss-value-parser to 2.0.2.

2.0.0

• Upgraded to PostCSS 5.

1.3.1

• Fixes an issue where the module would convert values in gradient/url functions
  since 1.3.0.

1.3.0

• Converted the module to use ES6.
• balanced-match, css-list & some integrated code has been replaced with
  postcss-value-parser; reducing the number of moving parts in this module, and
  providing a more futureproof way of parsing CSS numeric values.

1.2.5

• Fixes an issue where uppercase units (such as PX) were being deleted.

1.2.4

• Fixes convert not px or ms

1.2.3

• Adds support for ch units; previously they were removed.
• Upgrades css-list to 0.1.0, code tidied up.

1.2.2

• Added support for viewport units (thanks to @TrySound).

1.2.1

• Fixes regressions introduced by the previous patch. Better support for
  negative value transforms.

1.2.0

• Adds support for slash/comma separated values (thanks to @TrySound).

1.1.1

• Fixes an issue where trailing zeroes were not being removed in
  values that were not 0 (thanks to @TrySound).

1.1.0

• Adds support for removing leading zeroes from rem values
  (thanks to @tunnckoCore).

1.0.3

• Fixed a bug where filenames were being incorrectly transformed.

1.0.2

• Fixed a bug where 1. and .0 were not being optimised to 1 and 0,
  respectively.

1.0.1

• Fixed a bug where undefined would be stringified as the unit value, if the
  value did not have a unit.

1.0.0

• Initial release.