Missing complete transition event types

[NickClark]

Describe the bug
When trying to bind to transition events on an HTML element in Typescript, only ontransitionend is available. If you ignore the type errors, it runs fine.

To Reproduce

<div
  on:transitionstart={() => {
    console.log("start");
  }}
  on:transitioncancel={() => {
    console.log("cancel");
  }}
  on:transitionend={() => {
    console.log("end, I'm the only one that passes type checking");
  }}></div>

Expected behavior
All three of the above should be allowed.

System (please complete the following information):

• OS: Windows
• IDE: VSCode
• Plugin/Package: Svelte for VSCode

[NickClark]

Wow! Nice turnaround! 👏