and so it begins...

Summary: This is the basic setup for TypeScript support in Flipper and makes sure our build system can handle `.ts(x)` files. Support for flow is still fully working, so we can land this and continue with the TS migration.

Reviewed By: jknoxville

Differential Revision: D15920150

fbshipit-source-id: d5a7f22fe824d1c1904105bbf738767d735cc0f1

tsconfig.json

@@ -0,0 +1,17 @@
+{
+  "compilerOptions": {
+    "module": "system",
+    "removeComments": true,
+    "preserveConstEnums": true,
+    "outFile": "../../built/local/tsc.js",
+    "sourceMap": true,
+    "jsx": "react",
+    "moduleResolution": "node",
+    "baseUrl": ".",
+    "paths": {
+      "flipper": ["./src/index.js"]
+    }
+  },
+  "include": ["src/**/*"],
+  "exclude": ["node_modules", "**/*.spec.ts"]
+}