WasmI8 constructor Null safety

1. Flutter
2. dart:wasm
3. WasmI8
4. WasmI8 constructor

WasmI8 class

1. Constructors
2. WasmI8
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. noSuchMethod
8. toString
9. Operators
10. operator ==