Re-use base tsconfig options

Summary: Added tsconfig.base.json and extend other tsconfigs from it.

Reviewed By: passy

Differential Revision: D20594653

fbshipit-source-id: 28dd80262613e78a7c4ce25fa31f251537ec2b06

desktop/tsconfig.base.json

@@ -0,0 +1,16 @@
+{
+  "compilerOptions": {
+    "module": "commonjs",
+    "lib": ["es7", "dom", "es2017"],
+    "esModuleInterop": true,
+    "target": "ES2017",
+    "removeComments": true,
+    "preserveConstEnums": true,
+    "sourceMap": true,
+    "jsx": "react",
+    "moduleResolution": "node",
+    "skipLibCheck": true,
+    "strict": true,
+    "incremental": true
+  }
+}