fix binding to custom model/view-model (use dash-case instead camelCase didn't work)
fix binding to custom model/view-model (use dash-case instead camelCase didn't work)

sickboy/aurelia-bs-modal,PWKad/aurelia-bs-modal,PWKad/aurelia-bs-modal,sickboy/aurelia-bs-modal,atsu85/aurelia-bs-modal,atsu85/aurelia-bs-modal