Merge pull request #54 from wscfe/patch-1

Update index.ts

bump to v1.6.0

Merge pull request #50 from qmhc/master

style: using reduce instead of for-loop

chore: fix typo

fix: improve loop

fix: use for loop

docs: change comments to english

perf: improve operation performance and smaller size

chore: bump to v1.5.2

Merge pull request #46 from lvqq/master

fix: add tsc in prepublish to generate .d.ts file

fix: add declaration in tsconfig

Merge pull request #44 from chrislone/master