version bump 1.2.0: v8 performance

- eliminated deopt oddities
- decode objects are arrays
- str.charCodeAt(i) preferred to str[i].charCodeAt(0) in processing
- encache and decache check before acting
version bump 1.3.0: performance

- more specializations in cptable
- removed functional badnesses in cptable
- bits reworked to minimize functional impact (which caused deopts)

some loss in coverage due to standard codepages missing astral characters