Error on validated form reload

[MaximBalaganskiy]

I'm submitting a bug report

• Library Version: 0.2.1

Please tell us about your environment:

• Operating System: Windows 10

• Node Version: 12.16.2

• NPM Version: 6.14.4

• JSPM OR Webpack AND Version webpack 4.44.2

• Browser: all

• Language: TypeScript 4.0.3

Current behavior: Updating a template or a view model which uses ValidationController causes HMR to crash with

Uncaught (in promise) Error: A ValidationController has not been registered.
    at ValidateBindingBehaviorBase.bind (aurelia-validation.js?f0d7:1082)
    at BindingBehavior.bind (aurelia-binding.js?5f98:1191)
    at Binding.bind (aurelia-binding.js?5f98:4996)
    at View.bind (aurelia-templating.js?8628:1678)
    at eval (render-utils.js?b780:95)
    at Array.forEach (<anonymous>)
    at rerenderMatchingSlotChildren (render-utils.js?b780:80)
    at eval (aurelia-hot-module-reload.js?e5b8:215)
    at Set.forEach (<anonymous>)
    at HmrContext.eval (aurelia-hot-module-reload.js?e5b8:215)

Expected/desired behavior:

• What is the expected behavior? The HRM refreshes without crashing

• What is the motivation / use case for changing the behavior? Better support development cycle by removing the need to refresh a page after each update