Parse updated event text and binary format (#1014)

An event has a type-section index, like a function definition. The
current proposal doesn't specify the text format, so I assumed that it
would match the format of the other sections that reference function
types. This means that the following declaration styles are allowed:

```
(type $t (func (param i32)))
(event $e1 (type $t))
(event $e2 (param f32))
```

1 files changed, 1 insertions, 1 deletions

diff --git a/src/ir.h b/src/ir.h
index 78014bfa..d61f971e 100644
--- a/src/ir.h
+++ b/src/ir.h
@@ -417,7 +417,7 @@ struct Event {
   explicit Event(string_view name) : name(name.to_string()) {}
 
   std::string name;
-  TypeVector sig;
+  FuncDeclaration decl;
 };
 
 class LocalTypes {