fix: crashes when v-on expression is not a function (#2605)

[luwuer]

Close #2605

Assert if expression is a function by wraping it into a IIFE when the expression is a Instance member, if not warning and return NOOP.

Which expression are instance members:

• @blur="test"
• @blur="funs.test"

I am not sure that this PR is the best solution.

[luwuer]

I thought about this PR when I was having dinner, i find that this is not a good solution because of below:

1. Increased pack(compiled) size, lots of redundant code.
2. No consistent experience when expression is not instance member, such as inline or function.
   • @blur="test(123, $event)"
   • @blur="() => { test() }"

I am confused, can you give me some suggestions for better ways? @yyx990803

[yyx990803]

Thanks for the PR, but the fix can be simpler - see e4f09c1