v1.4.0
Merge branch 'release/1.4.0' into production
Merge tag 'v1.4.0'

1.4.0

 * slt-release: normalize version prefixes (Ryan Graham)

 * Ensure versions are properly formatted (Ryan Graham)

 * Use sl-blip (Ryan Graham)

 * slt-release: update sl-blip deps if present (Ryan Graham)

 * Add CLI for updating package version (Ryan Graham)

 * Project.optionalDep() for get/set of deps (Ryan Graham)

 * Project.nameVer() to get package@x.y.z (Ryan Graham)

 * Update normalized pkg when raw pkg changes (Ryan Graham)

 * Don't cache target package.json (Ryan Graham)

 * Use tap as test runner (Ryan Graham)