Add complex number.

Signed-off-by: CyberZHG <CyberZHG@gmail.com>
Update changelog.

Signed-off-by: CyberZHG <CyberZHG@gmail.com>
Merge branch 'js_test' into js
Update readme.

Signed-off-by: CyberZHG <CyberZHG@gmail.com>
Merge branch 'js'

Conflicts:
	.gitignore