Actions should be able to accept template strings as arguments.

[AGoblinKing]

https://svelte.technology/repl?version=2.9.5&gist=ad939c33265c86335cdb70f84c5eee41

Currently you cannot pass template strings to actions. This makes some use cases rather annoying to implement. ie: iterating over a list and passing data as a string.

Thanks!

[Rich-Harris]

Fixed in 2.12.1 thanks to @jacwright 🎉