v0.0.4

v0.0.4 Feb 13, 2019

• Use .nvmrc to provide node version if available
  (https://www.pivotaltracker.com/story/show/163528537)

• Add node 10.15.1
  for stack(s) io.buildpacks.stacks.bionic, org.cloudfoundry.stacks.cflinuxfs3
  (https://www.pivotaltracker.com/story/show/163568677)