Update bl

[mat007]

# npm ls bl
Kitematic@0.17.12 /kitematic
+-- bl@1.2.3
+-- dockerode@3.0.1
| `-- tar-fs@2.0.0
|   `-- tar-stream@2.1.0
|     `-- bl@3.0.0
`-- grunt-contrib-compress@1.5.0
  `-- archiver@1.3.0
    `-- tar-stream@1.6.2
      `-- bl@1.2.3  deduped