Rename call_* to invoke_* for callbacks

Fixes #187

api/sixtyfps-rs/docs.rs

@@ -96,7 +96,7 @@ pub mod generated_code {
         /// For each callback declared at the root of the component, a function to call that
         /// callback is generated. This is the function that calls the `hello` callback declared
         /// in the `.60` design markup.
-        pub fn call_hello(&self) {}
+        pub fn invoke_hello(&self) {}
         /// For each callback declared at the root of the component, a function connect to that callback
         /// is generated. This is the function that registers the function f as callback when the
         /// callback `hello` is emitted. In order to access

api/sixtyfps-rs/lib.rs

@@ -111,7 +111,7 @@ For each top-level property
   - A getter [`fn get_<property_name>(&self) -> <PropertyType>`](docs::generated_code::SampleComponent::get_counter)
 
 For each top-level callback
-  - [`fn call_<callback_name>(&self)`](docs::generated_code::SampleComponent::call_hello): to emit the callback
+  - [`fn invoke_<callback_name>(&self)`](docs::generated_code::SampleComponent::invoke_hello): to invoke the callback
   - [`fn on_<callback_name>(&self, callback: impl Fn(<CallbackArgs>) + 'static)`](docs::generated_code::SampleComponent::on_hello): to set the callback handler.
 
 After instantiating the component you can call just [`fn run(&self)`] on it, in order to show it and spin the event loop to