fix: false positive for customElement="..." in svelte/valid-compile

Author: ota-meshi

src/shared/svelte-compile-warns/index.ts

@@ -446,6 +446,7 @@ function getWarningsFromCode(code: string): {
   try {
     const result = compiler.compile(code, {
       generate: false,
+      customElement: true,
     })
 
     return { warnings: result.warnings as Warning[], kind: "warn" }

tests/fixtures/rules/valid-compile/valid/svelte-options-custom-element-input.svelte

@@ -0,0 +1 @@
+<svelte:options customElement="my-component" />