[TRAVIS] use both of latest and lts to test (#2) * [TEST] change log level to 3 * [TRAVIS] use 'latest stable Node.js release' and 'latest LTS Node.js release' for testing * [TRAVIS] suppress log while configuring
[TRAVIS] use both of latest and lts to test (#2) * [TEST] change log level to 3 * [TRAVIS] use 'latest stable Node.js release' and 'latest LTS Node.js release' for testing * [TRAVIS] suppress log while configuring