update travis config

version bump

notes for dtrust example

version bump: 4.1.0

Merge pull request #31 from BlockIo/4.0-dev

update dependencies + version bump

disambiguate this.api_key and fix for string-based instantiation

add support for dynamic decryption algorithms + version bump

allow nodejs v16 v15

Merge pull request #27 from BlockIo/dependabot/npm_and_yarn/elliptic-…

…6.5.4

Bump elliptic from 6.5.3 to 6.5.4

tests differ for server-side and client-side failures