Add Erlang/OTP 17.0 to the Travis CI test matrix and update meck dependency

Missing Erlang/OTP R16B01 - R16B03-01 are also added to the test matrix.
Merge pull request #40 from synlay/feature/otp_17.0_dependency_update

Add Erlang/OTP 17.0 to the Travis CI test matrix and update meck dependency