Fix typescript import elision (#8666)

packages/babel-plugin-transform-typescript/src/index.js

@@ -40,7 +40,7 @@ export default declare((api, { jsxPragma = "React" }) => {
             // Note: this will allow both `import { } from "m"` and `import "m";`.
             // In TypeScript, the former would be elided.
             if (stmt.node.specifiers.length === 0) {
-              return;
+              continue;
             }
 
             let allElided = true;

packages/babel-plugin-transform-typescript/test/fixtures/imports/elision/input.mjs

@@ -1,3 +1,4 @@
+import "lib";
 import A, { B, Used } from "lib";
 import Used2, { C } from "lib";
 import * as D from "lib";

packages/babel-plugin-transform-typescript/test/fixtures/imports/elision/output.mjs

@@ -1,3 +1,4 @@
+import "lib";
 import { Used } from "lib";
 import Used2 from "lib";
 import * as Used3 from "lib";