Print async keyword for component declarations (#19053)

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

tests/format/flow/component/__snapshots__/format.test.js.snap

@@ -72,6 +72,16 @@ component MyComponent(
 
 component MyComponent() /* Trailing comment */ {}
 
+async component MyAsyncComponent() {}
+
+async component MyAsyncComponent() renders SomeComponent {}
+
+async component MyAsyncComponent(bar: string, baz: number) {
+  return <OtherComponent />;
+}
+
+export async component MyExportedAsyncComponent() {}
+
 =====================================output=====================================
 component MyComponent() {}
 
@@ -174,6 +184,16 @@ component MyComponent(
 
 component MyComponent() /* Trailing comment */ {}
 
+async component MyAsyncComponent() {}
+
+async component MyAsyncComponent() renders SomeComponent {}
+
+async component MyAsyncComponent(bar: string, baz: number) {
+  return <OtherComponent />;
+}
+
+export async component MyExportedAsyncComponent() {}
+
 ================================================================================
 `;
 

tests/format/flow/component/component-declaration.js

@@ -64,3 +64,13 @@ component MyComponent(
 ) {}
 
 component MyComponent() /* Trailing comment */ {}
+
+async component MyAsyncComponent() {}
+
+async component MyAsyncComponent() renders SomeComponent {}
+
+async component MyAsyncComponent(bar: string, baz: number) {
+  return <OtherComponent />;
+}
+
+export async component MyExportedAsyncComponent() {}

tests/format/flow/hook/__snapshots__/format.test.js.snap

@@ -297,6 +297,14 @@ hook useFoo14<
   T: Fooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo,
 >(): any {};
 
+async hook useAsyncFoo1() {}
+
+export async hook useAsyncFoo2() {}
+
+async hook useAsyncFoo3(): string {}
+
+async hook useAsyncFoo4(foo: Foo, ...bar: Bar) {}
+
 =====================================output=====================================
 hook useFoo1() {}
 
@@ -337,6 +345,14 @@ hook useFoo14<
   T: Fooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo,
 >(): any {}
 
+async hook useAsyncFoo1() {}
+
+export async hook useAsyncFoo2() {}
+
+async hook useAsyncFoo3(): string {}
+
+async hook useAsyncFoo4(foo: Foo, ...bar: Bar) {}
+
 ================================================================================
 `;
 

tests/format/flow/hook/hook-declaration.js

@@ -28,3 +28,11 @@ hook useFoo13(foo: Array<Foooooooooooooooooooooooooooooooooooooooooooooooooooooo
 hook useFoo14<
   T: Fooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo,
 >(): any {};
+
+async hook useAsyncFoo1() {}
+
+export async hook useAsyncFoo2() {}
+
+async hook useAsyncFoo3(): string {}
+
+async hook useAsyncFoo4(foo: Foo, ...bar: Bar) {}