add @types/react-devtools (#37269)

* create react-devtools type

* lint

* fixes

done after running npm run lint react-devtools

types/react-devtools/index.d.ts

@@ -0,0 +1,7 @@
+// Type definitions for react-devtools 3.6
+// Project: https://github.com/facebook/react-devtools
+// Definitions by: Paulo Andrade <https://github.com/prma85>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.4
+
+export function main(): any;

types/react-devtools/react-devtools-tests.ts

@@ -0,0 +1,5 @@
+async function init() {
+    await import('react-devtools');
+}
+
+init();

types/react-devtools/tsconfig.json

@@ -0,0 +1,23 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "strictFunctionTypes": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "react-devtools-tests.ts"
+    ]
+}

types/react-devtools/tslint.json

@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }