v1.2.1

• New feature: better input validation (rejects NaN, Infinity as values)
• More accurate plusMinus computation, better tests for those computations

v1.2.0

What's Changed

• New convert() API
• Higher performance (see benchmarks)
• Fixed: some SI units were not prefixable
• Q string parser can now handle plusMinus values

0.1.0

Initial release.