Merge pull request #32673 from elliottsj/styled-components-stylesheet-seal

[styled-components] Add ServerStyleSheet.seal()

types/styled-components/index.d.ts

@@ -446,6 +446,7 @@ export class ServerStyleSheet {
         readableStream: NodeJS.ReadableStream
     ): NodeJS.ReadableStream;
     readonly instance: this;
+    seal(): void;
 }
 
 type StyleSheetManagerProps =

types/styled-components/test/index.tsx

@@ -472,6 +472,7 @@ const sheet = new ServerStyleSheet();
 const html = sheet.collectStyles(<SSRTitle>Hello world</SSRTitle>);
 const styleHtml = sheet.getStyleTags();
 const styleElement = sheet.getStyleElement();
+sheet.seal();
 
 const sheet2 = new ServerStyleSheet();
 const element = (