Rename test fixtures using module syntax to .mjs files.

packages/babel-plugin-transform-function-name/test/fixtures/function-name/export/input.mjs

@@ -0,0 +1,19 @@
+export var foo = "yes", foob = "no";
+
+export function whatever() {}
+
+export default function wowzers() {}
+
+var bar = {
+  foo: function () {
+    foo;
+  },
+
+  whatever: function () {
+    whatever;
+  },
+
+  wowzers: function () {
+    wowzers;
+  }
+};