deps: updated shimmer
release: 0.4.2 - updated shimmer
code: polyfill in _normalizeConnectArags

Node < 0.8.4 doesn't have this function, and the Socket instrumentation
relies upon it. This polyfilled polyfill is @isaacs's fault.
docs: added badge
release: 0.4.3 - polyfill net._normalizeConnectArgs for 0.8
deps: PR #6011 is on master for 0.11.9 / 0.12.0
Merge branch 'master' of github.com:othiym23/async-listener