v0.9.4

🐛 Bug Fix

• Release 0.9.4 #258 (@yannbf)
• Support other test-runner config extensions #259 (@yannbf)
• Use ipv4 loopback address #252 (@IanVS)
• Fix safe json stringify code #239 (@hansottowirtz)

Authors: 3

• Hans Otto Wirtz (@hansottowirtz)
• Ian VanSchooten (@IanVS)
• Yann Braga (@yannbf)