fix: update Travis script

fix: correct readme instructions

feat: update dependencies, add linting and Coveralls

Upgrade to v1.2.1

Upgrade to v1.2.0

Upgrade to 1.1.3

Changed npm module loading strategy

Upgraded to 1.1.1. Added test coverage tracking

Upgrade to 1.1.0, added test coverage

Upgrade to 1.0.0, new interface