v4.0.0

Bug Fixes

• move IPFS_PATH test to a node specific file (9d9cedd)
• revert boom and hapi (a92177f)
• use IPFS_PATH env var (708c7cc), closes #497

Features

• ipfsd-ctl server can find free ports (db64997)
• update deps and remove support for node 8 (2565199)

BREAKING CHANGES

• node 8 support removed