v2.0.4

• Fixed: CSS variable regex was overly greedy and caused a crash in some
  cases. (#27 - @andyjansson)

v2.0.3

• Fixed: Regression in handling decimals without having any numbers after
  the decimal place (e.g. 10.px).

v2.0.2

• Fixed: Regression in consecutive subtraction handling
  (#25 - @andyjansson)

v2.0.1

• Fixed: Support for nested calc e.g. calc(100% - calc(50px - 25px)).
• Fixed: Support for CSS variables e.g. calc(var(--mouseX) * 1px).

v2.0.0

• Rewritten with a jison parser for more accurate value parsing.
• Breaking: reduce-css-calc will now throw when trying to multiply or divide
  by the same unit (e.g. calc(200px * 20px)), and also when trying to divide
  by zero.
• Added: Better handling of zero values (e.g. calc(100vw / 2 - 6px + 0px)
  becomes calc(100vw / 2 - 6px)).
• Added: Better handling of mixed time values (e.g. calc(1s - 50ms)
  becomes 0.95s).
• Added: Inner parentheses calculation to simplify complex expressions (e.g.
  calc(14px + 6 * ((100vw - 320px) / 448)) becomes calc(9.71px + 1.34vw)
  with precision set to 2).
• Fixed: calc(1px + 1) does not evaluate to 2px.

(#22 - @andyjansson)

1.3.0

• Added: calc identifier from unresolved nested expressions are removed for
  better browser support
  (#19 - @ben-eb)

1.2.8

• Fixed: regression from 1.2.5 on calc() with value without leading 0
  (#17 - @ben-eb)

1.2.7

• Fixed: regression from 1.2.5 on calc() with value without leading 0
  (@MoOx)

1.2.6

• Fixed: regression from 1.2.5 on calc() on multiple lines
  (@MoOx)

1.2.5

• Fixed: security issue due to the usage of eval().
  This is to avoid an arbitrary code execution.
  Now operations are resolved using
  math-expression-evaluator