Make the typescript preset require a filename unless the user configured it for general use.

packages/babel-plugin-syntax-jsx/src/index.js

@@ -5,6 +5,16 @@ export default declare(api => {
 
   return {
     manipulateOptions(opts, parserOpts) {
+      // If the Typescript plugin already ran, it will have decided whether
+      // or not this is a TSX file.
+      if (
+        parserOpts.plugins.some(
+          p => (Array.isArray(p) ? p[0] : p) === "typescript",
+        )
+      ) {
+        return;
+      }
+
       parserOpts.plugins.push("jsx");
     },
   };