From looking at the travis build errors, and (roughly) recreating the environment (node v0.10.48), I believe the build issue was related to missing dependencies (I'm guessing these are pulled in as peer dependencies when using later node/npm versions), as well as a missing polyfill for the mocha tests (for Set & Map).
From looking at the travis build errors, and (roughly) recreating the environment (node v0.10.48), I believe the build issue was related to missing dependencies (I'm guessing these are pulled in as peer dependencies when using later node/npm versions), as well as a missing polyfill for the mocha tests (for
Set&Map).