v2.3.8

Release note:

#173 Fix the wrong property for name id format
#170 #176 Update documentation for breaking change of API >= 2.0
#174 Fix syntax error of type definition in libsaml module
#187 Use npm published package instead of github repo link
#190 Expose InResponseTo in parseLoginResponse extract (@benbabic)

9dc7460 Put type definitions back to dependencies list
1d78763 Update the testing scope of different node version

The current testing build for Node.js v10 is broken, we will seek for a fix in next release very soon.