Fix TypeScript support for update-react-imports (reactjs#275)

* Add TypeScript tests for update-react-imports * Fix update-react-imports for TS * Add more tests

Author: gaearon

transforms/__testfixtures__/update-react-imports/typescript/default-and-multiple-specifiers-import-react-variable.tsx.input.js

@@ -0,0 +1,5 @@
+import React, { createElement, useState } from "react";
+
+React.createElement('div', {});
+
+<div>Hi</div>;

transforms/__testfixtures__/update-react-imports/typescript/default-and-multiple-specifiers-import-react-variable.tsx.output.js

@@ -0,0 +1,6 @@
+import { createElement, useState } from "react";
+import * as React from "react";
+
+React.createElement('div', {});
+
+<div>Hi</div>;

transforms/__testfixtures__/update-react-imports/typescript/default-and-multiple-specifiers-import.tsx.input.js

@@ -0,0 +1,3 @@
+import React, { createElement, useState } from "react";
+
+<div>Hi</div>;

transforms/__testfixtures__/update-react-imports/typescript/default-and-multiple-specifiers-import.tsx.output.js

@@ -0,0 +1,3 @@
+import { createElement, useState } from "react";
+
+<div>Hi</div>;

transforms/__testfixtures__/update-react-imports/typescript/jsx-element.tsx.input.js

@@ -0,0 +1,3 @@
+import * as React from "react";
+
+<div>Hi</div>;

transforms/__testfixtures__/update-react-imports/typescript/jsx-element.tsx.output.js

@@ -0,0 +1 @@
+<div>Hi</div>;

transforms/__testfixtures__/update-react-imports/typescript/jsx-fragment.tsx.input.js

@@ -0,0 +1,3 @@
+import * as React from "react";
+
+<></>;

transforms/__testfixtures__/update-react-imports/typescript/jsx-fragment.tsx.output.js

@@ -0,0 +1 @@
+<></>;

transforms/__testfixtures__/update-react-imports/typescript/leading-comment.tsx.input.js

@@ -0,0 +1,7 @@
+/**
+ * Hello world.
+ */
+
+import * as React from "react";
+
+<div></div>;

transforms/__testfixtures__/update-react-imports/typescript/leading-comment.tsx.output.js

@@ -0,0 +1,5 @@
+/**
+ * Hello world.
+ */
+
+<div></div>;